I liked both to be honest. GTA SA was more fun but GTA IV had better cars, graphics, ect.

i think GTA SA is more better it has a better story line then GTA IV i think CJ is more better then Niko Bellic but SA is abit boring but it is really fun with gym and learning new skill moves, flying Helicopter's,Plane's.... But i only like GTA IV because of the Multiplayer but there are too many moddersbut on the other hand GTA SA on the PC witch i have is good for multiplayer mafia's and ramps and stuff like that......

GTA SA had much more content, a bigger world, a better storyline, etc. But GTA IV wasn't as much about the quantity of content as it was about the quality. They put a lot of effort into both games, but GTA IV probably had a better replay value than SA as far as multiplayer goes, but single player was better in GTA SA. Overall, I think I had more fun with SA.

San Andreas was my favorite in terms of gameplay. GTA IV, I liked it but the missions were to repetitive.

i got both on my xbox, they are both still good to play. GTA IV, i just run around and mess up everything and SA i just do the story

I have Both on my xbox too but i dont really play it as much as GTA IV i play GTA IV more because i am in a Mafia, My name is Josh T Porrello, Porrello Crime Family and thats why i play GTA IV more...