Question about different Britax seat?

[christenjoy]

I have a friend on Facebook who asked about the different Britax seats. Here's her question if you could help me answer her!
is there REALLY a difference between the Britax Marathon70 and the Boulevard70? or the Boulevard70 CS and the Advocate70 CS? and what does CS even mean???

[jjordan]

The BV70 has bigger head "wings" than the Marathon. That's the only difference.

The CS refers to a "click & safe" feature that has a click indicator to help the caregiver determine when the harness is tight enough. It doesn't always work correctly, and ideally someone should know how tightly to pull the harness without it anyway.

The Advocate has exterior side impact "cushions" on the side, but otherwise is identical to the boulevard 70cs.

[christenjoy]

Thank you!