That looks sturdier & has a wider ledge...but is your baby going to sit in there? I'm just asking cuz Mimi will not sit in a seat. She like to hang her head out the window & act like a big dog!
I've seen lots of YTers w/this:
Outward Hound Car Seats: Outward Hound Lookout Booster Seat for Dogs at PETCO
They usu have it on the back...