http://forums.facepunchstudios.com/showthread.php?t=507630
:O
Makes it look better but the gameplay is still the same, GTA IV gameplay has improved so much since SA, fighting is more fun/real, vehicles detail is insane as well as when you damage them they really do get smashed. Cars don't explode for shooting the drivers seat in IV which was one of the most best features I loved, I hated getting blown up by a few bullets.
GTA SA was sweet at the time but had to much, like fat and muscle etc, wasn't really what players want to worry about, GTA IV is the new game and its really 10x better then SA. No doubt GTA SA was a classic but the new is in and its better.
As for Planes, I was a bit sad about it but in GTA IV you don't want to be flying in planes... Helicopters are sweeeet but planes would some what ruin the experience.