Ok so DD1 is currently in a Marathon (almost 3 years old). DD2 is in the Graco Safeseat (almost 1 year (24lbs, 31in)).

I just bought DD1 the Graco Nautilus for my husband's car (which of course now she wants in my car because she loves her big girl seat) and I bought DD2 a Marathon for when we turn her forward facing.

But now I'm wondering if I should sell the Marathon for DD2 and just get her a Nautilus too. Is there any reason why a Nautilus isn't good for a one year old who is forward facing (and I do know it's best to keep them rear facing as long as possible).

Is it safer to keep her in the Marathon until she's close to 3 and then get her a Nautilus type carseat?

Thanks!