VCS had a much better looking rendition of Vice City, more neon lighting, orange sunsets, areas that were empty in VC now have new places such as the theme park with the Chunder Wheel.
Being able to swim is one of the main advantages this game has over VC, Tommy's drowning was frustrating.
The radio in VCS is one of the best in the whole series, VC's was good, but this one has more songs I really like.
VCS has much more side stuff to keep you busy once the storyline is out of the way. Completing the storyline and nothing else only got you around 30% completion, so there is a lot to be done.
I really like the new, useful roads in VCS, particularly the ones that go from Little Havana to the airport.
For me, VCS was better.