Hi Nae . The one with the swivel base is a Turn-a-tot and I've heard it is great for fitting in smaller cars. The only downside is that it doesn't swivel when in forward-facing mode, but that's not really a biggie.

Another model that suits smaller cars is the Safe-N-Sound Compaq. It is smaller and narrower than standard SNS car seats so that may be good too.

I personally love Safe-N-Sound car seats, they are great quality, exceed safety standards and very user friendly.

Good luck deciding!