Safety-wise, as far as anyone knows, they are the same. Companies will always come out with new features, making a seat "safer", but we have absolutely no way to know if this translates to a car seat that is
actuallysafer than any other on the shelf. We are not given data on how well one car seat preforms over another. All that we know is that they pass the standards, which are pretty stringent, so you can rest assured that any seat sold on the market in your country is safe, provided it fits your child and vehicle, and is used correctly each and every time.
I would buy a G3 if that was what was available (and if I liked the cover pattern, of course!) and I would feel absolutely fine about it. I have owned several G3 Britax seats and have loved them!
There is a way, however, for you to make sure your daughter is even safer in the car once you've chosen a seat that fits, and that is making sure her car seat faces the correct direction, the rear! Rear facing your child in their car sear is one of the best steps you can take to ensure their safety in the vehicle. We would all be safer rear-facing! (I don't think i'd fit in the Advocate, though
). Here is an article jam-packed with information explaining exactly why rear facing until a
minimum of two years old is so highly recommended. Have a read if you wish!
http://carseatblog.com/5168/why-rear-facing-is-better-your-rf-link-guide/
It is common practice around here to rear face until 3, 4 and even 5 years old! Children really do not mind it, most like it and are a little ticked when you turn their seat forward. It makes it more comfortable for sleeping (they just stick their legs wherever they please, when do kids sit with their legs straight, anyway?) and it is great for keeping their toys and sippy cups in their laps and not on the floor, they can also see out both side windows and the rear window as well!
I hope you stick around and become part of the community
We love new members!