Britax Marathon G4 vs Pavilion G4 vs Boulevard G4 vs Advocate G4

Britax Marathon G4 vs Pavilion G4 vs Boulevard vs Advocate G4

If you want to compare Britax Marathon G4,  Pavilion G4, Advocate G4, and Boulevard G4 here is a quick comparison for you to learn all the differences between them.

Let’s start with Marathon G4 which is the most famous convertible seat of Britax for the last few years, it is also the best way to define differences of these three car seats for us.

A newer version is now available, you can read more about it here, or read reviews from parents by clicking the image below.


Marathon G4 models have all of the features that pavilion and advocate have except:

  1. True side impact protection type
  2. Click and Safe indicator feature
  3. Super thick chest pads

Please don’t get it wrong, Marathon also has similar features but not exactly the same, for example Marathon of course has side impact protection but this the inside the cushion. Advocate and Pavilion models have also  have extra head protection.

Marathon has also a different version of super thick chest pads than other models but it is still %100, safe.
The Click&Safe indicator means that when you strapped the harness correctly you will hear a click sound, this feature is missing in Boulevard and Marathon.

When we compare G4 line of seats the one with all the feature is the Advocate G4 model, it has a bulky addition in the head area for more safety, this is the only difference between the Advocate and Pavilion.

So if you want to sort these car seat with ascending number of features we have this order ( basic to advanced):

Britax Marathon G4

Britax Boulevard G4

Britax Pavilion G4

Britax Advocate G4


You can also read our previous post about the G3 and G4 differences here.



Britax G3 vs G4 Car Seats, What are the New Features?

Differences of G3 and G4 car seats from Britax

So you want to compare Britax G3 vs G4? As you may noticed Britax updated their line of car seats with a new series called G4. The previous models were called G3 models.

Many parents who want a Britax convertible want to be sure if it is worth to buy a G4 model rather than a G3 model which is slightly cheaper. So here we try to put the differences between these two lines of car seats.

The G4 Britax Convertibles will have:

  • Weight limits are now 65 lbs, which are 70 lbs. in previous models, (i.e. Marathon-70 G3, Advocate-70 G3). So weight limit of G4 models is 65 lbs. This, first seems to be a disadvantage but in fact most children reach the height limit before they weigh 70 lbs. so no problems here.
  • A new infant insert is designed for G4 family of car seats for children up to 22 lbs.
  • The HUGS design is redesigned, now it is more difficult for children to push down.
  • The G4 models comes with color-coded to easy identification of car seat type .

So these are the new features, the other features are same for same models. For example Britax Marathon G4 has all the features of Marathon 70-G3, plus new features of G4 seat and weight limit is 65 lbs.

Again Britax Advocate G4 has all the features of Advocate 70-G3, plus new features of G4 line of seats with a weight limit of 65 lbs.