Here are the details of this version, translated from that mag.
- Like the upcoming PC version and even the PS2 version, the Xbox version has almost no loading times other than the beginning after you load a game.
- The framerate was noticably more stable than the PS2 version when the Dutch Xbox Magazine guys saw the game.
- The Xbox version will feature sharper textures than the PS2. Whether or not it will have the highest resolution textures that the PC will have it yet to be seen.
- The Xbox will feature a reworked lighting system rather than keep the PS2's version.
- It's no surprise that custom soundtracks are back, so you can put in your own music CD's and play them in-game on your own radio station.
- The Xbox version will feature a replay mode just like previous PC versions.
- The magazine mentioned that the two player cooperative mode will return in the Xbox version.
http://www.gtaforums.com/index.php?showtopic=188989
My bro got the PS2 version for me (along with a strat guide) for my birthday, but after hearing about the XBox version I flipped it along with the disappointing Smackdown vs Raw for GT4. Think I only played the PS2 version for like a half hour. :lol Plus I still wanna finish Vice City before getting into SA.