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Britax Marathon vs Advocate vs Boulevard: Features, Pros & Cons, and How to Choose

January 6, 2021 by Sam Webster Leave a Comment

Britax Marathon ClickTight Convertible Car Seat - 1 Layer Impact Protection, Verve

Marathon

Britax Advocate ClickTight Convertible Car Seat - 3 Layer Impact Protection - Rear and Forward Facing - 5 to 65 Pounds, Mosaic

Advocate

Britax Boulevard ClickTight Convertible Car Seat - 2 Layer Impact Protection - Rear and Forward Facing - 5 to 65 Pounds, Circa

Boulevard

Britax offers an extensive line of infant, convertible, and booster seats.

Included in their convertible car seat line are the ClickTight car seats that feature the super-easy ClickTight Installation System. They're highly reviewed as some of the best car seats that Britax has to offer, but today we'll only be looking at a few.

In this article, we'll be reviewing the Marathon, Advocate, and Boulevard ClickTight models, and we'll compare their similarities and differences to help you determine which of these popular car seats will be best suited for you.

Quick Navigation
Britax Marathon vs Advocate vs Boulevard Specifications Compared
Major Similarities Between Britax Marathon vs Advocate vs Boulevard
Major Differences Between Britax Marathon vs Advocate vs Boulevard
The Britax Marathon ClickTight
The Britax Advocate ClickTight
The Britax Boulevard ClickTight
Comparison of Britax Boulevard vs Marathon vs Advocate Clicktight Car Seats by PishPoshBaby
Wrapping Up

Britax Marathon vs Advocate vs Boulevard Specifications Compared

Header

BRITAX MARATHON

BRITAX ADVOCATE

BRITAX BOULEVARD

Cell
Britax Marathon ClickTight Convertible Car Seat - 1 Layer Impact Protection, Verve
Britax Advocate ClickTight Convertible Car Seat - 3 Layer Impact Protection - Rear and Forward Facing - 5 to 65 Pounds, Mosaic
Britax Boulevard ClickTight Convertible Car Seat - 2 Layer Impact Protection - Rear and Forward Facing - 5 to 65 Pounds, Circa

NHTSA Overall Ease of Use Rating (RF):

 5 stars

5 stars

4 stars

NHTSA Overall Ease of Use Rating (FF):

 5 stars

5 stars

5 stars

Side Impact Protection: 

SafeCell: formed by a deep energy-absorbing shell that protects your child from the most severe type of collision

3 Layers: formed by an energy-absorbing shell, foam-lined headrest, and external cushions

2 Layers: formed by an energy-absorbing shell and foam-lined headrest

Impact-Absorbing Base:

compresses to reduce the force of a collision

compresses to reduce the force of a collision

compresses to reduce the force of a collision

Impact-Stabilizing Steel Frame:

Yes

Yes

Yes

Weight:

28.5 pounds

30.6 pounds

29.4 pounds

Width:

18.5 inches

20.5 inches

18.5 inches

14-Position, Quick Adjust Harness System w/ 2-Position Buckle:

no re-threading necessary

no re-threading necessary

no re-threading necessary

Easy-Remove, Machine-Washable Cover:

Yes

Yes

Yes

Child Height Limit:

49 inches or less

49 inches or less

49 inches or less

Child Weight Limit (RF):

5 - 40 pounds

5 - 40 pounds

5 - 40 pounds

Child Weight Limit (FF):

20 - 65 pounds

20 - 65 pounds

20 - 65 pounds

ClickTight Installation System:

safe and easy to use

safe and easy to use

safe and easy to use

Plush Foam Padding and Fabrics:

for premium comfort

for premium comfort

for premium comfort

Removable Infant Insert Pillow:

w/ a breathable design for added support and comfort

w/ a breathable design for added support and comfort

w/ a breathable design for added support and comfort

Cell
Get Best Price for Britax Marathon
Get Best Price for Britax Advocate
Get Best Price for Britax Boulevard

Major Similarities Between Britax Marathon vs Advocate vs Boulevard

The first and most obvious similarity between each of these models is that they all use the ClickTight Installation System that makes it super simple and easy to install your car seat. This installation method can be done in 3 quick steps, and it offers a convenient solution/alternative to the limitations of LATCH.

In addition to that, the Marathon, Advocate, and Boulevard are all manufactured with an Impact-Absorbing Base and Impact-Stabilizing Steel Frame that work together to offer superior strength and stability while also reducing the impact force caused by a collision.

The Marathon, Advocate, and Boulevard car seats are also equipped with a non-rethread, 14-position, Quick-Adjust Harness System that can easily be adjusted as your child grows.

Lastly, each of these models has a high rear-facing weight limit of 40 pounds, and a forward-facing weight limit of 60 pounds. This means that your child can ride in a safer position for longer, as recommended by the NHTSA and other Child Passenger Safety organizations.

Britax Marathon ClickTight Convertible Car Seat - 1 Layer Impact Protection, Verve
Britax Advocate ClickTight Convertible Car Seat - 3 Layer Impact Protection - Rear and Forward Facing - 5 to 65 Pounds, Mosaic
Britax Boulevard ClickTight Convertible Car Seat - 2 Layer Impact Protection - Rear and Forward Facing - 5 to 65 Pounds, Circa

Major Differences Between Britax Marathon vs Advocate vs Boulevard

One of the major differences between the Britax Marathon, Boulevard, and Advocate car seats are the layers of side impact protection. The Marathon only has one layer, offering minimal yet high-quality support and protection. The Boulevard comes with two layers, adding enhanced protection for your child’s neck and head. And, the Advocate is equipped with three layers of side impact protection, providing superior support and protection.

Another notable difference between these models is their price. The Marathon is the cheapest, which makes sense seeing as it only has one layer of side impact protection with minimal padding for child comfort and support. Although it has three layers of side impact protection, the Advocate is the second cheapest out of these models, and that can probably be attributed to its padding as well.

In terms of price and padding, the Advocate perfectly fits between the Marathon and the Boulevard. The Boulevard is the most expensive, and it’s ultra-padded to give your child the most comfortable car riding experience.

The Britax Marathon ClickTight

Britax Marathon ClickTight Convertible Car Seat - 1 Layer Impact Protection, Verve

The Britax Marathon ClickTight utilizes the ClickTight Installation System to make installing your car seat easier and safer than ever before. It uses a deep foam-lined, energy-absorbing shell to create a single layer of side impact protection to guard your child against the impact force of a collision. As an added measure of safety, the Marathon ClickTight is also equipped with a patented V-shape tether that secures the car seat in place and minimizes rotation and forward movement in the event of a crash.

The Marathon ClickTight is also designed to grow with your child. It’s equipped with a 14-position Quick-Adjust harness system that makes it easy to adjust the harness as your child grows. It also features 7 recline angles and comes with an automatic level indicator to ensure that your baby rides in the safest and most comfortable position.

Pros

  • The Marathon is the cheapeast out of the three models
  • It comes with 7 recline angles and an automatic level indicator
  • It features the ClickTight Installation system to make it easier and safer to install your child’s car seat
  • It weighs the least compared to the Advocate and Boulevard and takes up less space in your vehicle
  • It’s very easy to install/uninstall
  • The Marathon is outfitted in a machine-washable cover

Cons

  • Although it’s the cheapest out of these three models, it’s still pretty pricey
  • There’s not enough padding
  • When it’s in the rear-facing position, it’s pretty bulky

What makes the Britax Marathon ClickTight stand out is its simplistic yet high-quality design that earned a 5-star rating in both the rear-facing and forward-facing position. I believe it’s best suited for parents who are interested in Britaxs’ line of ClickTight car seats and want the most affordable option. It’s adequately cushioned and comes with the same top-rated features as the Advocate and Boulevard.


If you decide that this is the car seat, I would suggest investing in Britaxs’ Head and Body Support Pillow to ensure that your child is comfortable every time they go for a ride.

Click Here for Best Price

The Britax Advocate ClickTight

Britax Advocate ClickTight Convertible Car Seat - 3 Layer Impact Protection - Rear and Forward Facing - 5 to 65 Pounds, Mosaic

To make installing your car seat quicker and easier, the Britax Advocate ClickTight comes with a ClickTight Installation System that reduces installation to three simple steps. It’s safer and offers a convenient solution to LATCH limitations. In addition to that, the Advocate ClickTight is equipped with three layers of side impact protection, including an energy-absorbing shell, quick-adjust headrest protection, and side cushions. Together, these features protect your child’s head and neck from the impact force of a collision.

The Advocate ClickTight is engineered with an Impact-Stabilizing Steel Frame that greatly enhances strength and stability, and it has a patented V-shape tether that keeps the car seat in place and minimizes forward movement in the event of a car crash. The Advocate is also equipped with a 14-position Quick-Adjust Harness System that’s designed to grow as your child does, and it can be easily adjusted without re-tethering the harness, saving you time and energy. 

To ensure that your child is seated at the proper angle, the Advocate comes with an automatic level indicator and seven recline angles that can also maximize your child’s comfort. It’s heavily padded and clothed in a machine-washable cover so that clean up is quick and easy.

Pros

  • The Advocate is easy to use and easy to install.
  • It comes with a 14-position harness to ensure your child’s comfort as they grow.
  • It features thre layers of side impact protection.
  • The Advocate is heavily padded to maximize child comfort and support
  • The seat cover is machine-washable

Cons

  • The Advocate is pretty heavy.
  • It’s pretty pricey.
  • Doesn’t come with a cup holder.

The Britax Advocate ClickTight car seat provides your child with the ultimate comfort and support. It’s best suited for parents who are willing to pay a pretty penny for a car seat that’s designed for comfort, just as much as it’s designed for safety. It’s a very high-quality device and comes with enhanced features that set this car seat apart from the rest.


For example, it has three layers of side impact protection. It’s easy to use and install, but keep in mind that the Advocate is the heaviest out of the models we’ve discussed. That’s something you may want to consider if you’re always out and about with your family.

Click Here for Best Price

The Britax Boulevard ClickTight

Britax Boulevard ClickTight Convertible Car Seat - 2 Layer Impact Protection - Rear and Forward Facing - 5 to 65 Pounds, Circa

The Britax Boulevard ClickTight comes with the ClickTight Installation System that makes it easier to install your car seat accurately and safely. It’s equipped with two layers of side impact protection that are comprised of an energy-absorbing shell and quick-adjust headrest protection.

The Boulevard also uses SafeCell Impact Protection that consists of an Impact-absorbing base and an Impact-stabilizing steel frame that works together to enhance your car seat’s overall stability and strength and minimize the impact force of a collision. In addition to that, the Boulevard also comes with patented V-shape tether that drastically reduces forward movement in the event of a car crash.

The Boulevard ClickTight is equipped with a 14-position Quick-Adjust Harness System that can easily be adjusted without re-tethering the harness so that it grows as your child does. It has seven recline angles to ensure that your child is seated at the proper and most comfortable angle. To be sure that your recline angle is correct, the Boulevard also comes with an automatic level indicator. It’s ultra-padded and clothed in a machine-washable cover that can be easily removed without removing the harness.

Pros

  • The Boulevard comes with two layers of side impact protection
  • It’s very easy to install/uninstall
  • It’s outfitted in a machine-washable seat cover
  • You can adjust the harness without re-tethering it.
  • You don’t have to uninstall your car seat to remove the seat cover.

Cons

  • The Boulevard doesn’t come with cup holders.
  • It’s the most expensive out the three models we’ve discussed.
  • It’s a bit bulky in the rear-facing position.
  • It’s pretty heavy.

The Britax Boulevard ClickTight is heavily padded and comes with two layers of side impact protection. It’s best suited for parents with a high budget who are looking for a high-quality Britax car seat that’s very easy to use. The Boulevard comes with enhanced features like the Quick-Adjust Harness System and automatic level indicator that make it easy to adjust the car seat so that your baby receives the ultimate comfort.


Besides its heavy padding, I wouldn’t say that there’s anything specific that makes this car seat stand out. Keep in mind that it’s heavy and that it doesn’t come with a cup holder, so you’ll have to buy one that’s compatible with your seat.

Click Here for Best Price

Comparison of Britax Boulevard vs Marathon vs Advocate Clicktight Car Seats by PishPoshBaby

Wrapping Up

The Britax Marathon, Advocate, and Boulevard are some of the most popular ClickTight convertible car seats that Britax has to offer. They're high-quality, highly rated, and they're equipped with superior features that provide enhanced safety, comfort, support, and stability. These models are also compatible with the Britax anti-rebound bar, a safety accessory that can be used as an added measure of protection against the impact force of a collision. If you're looking for a car seat that's long-lasting and worth the money, then the Marathon, Advocate, and Boulevard are a good place to start.

Sam Webster

With two kids of my own, I’m passionate about child safety! I’m a research nerd who’s on a mission to make the world a safer place for kids – starting with car seats!

To contact me directly please click here.

Filed Under: Britax

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Primary Sidebar

Hey! I’m Sam, mom of Sadie and Xavier.

When I started searching for a convertible car seat I was overwhelmed by the choices out there.

But being a research nerd, I relished the challenge of finding the best seat for my needs. And in the process, I gathered a ton of info!

Read More About Me

SafeConvertibleCarSeats is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. As an Amazon Associate we earn from qualifying purchases.

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