The gameplay will be different, but the game itself is obviously the same. It really depends on the game. Since u cant hack and cheat and mod so easily on an Xbox, you might notice players taking advantage of games on the computer. (example: halo 2 = people released halo 3 items into the system before halo 3 came out. Fallout 3: on the computer u can input cheats, but honestly who would want to do that? Cheating ruins the purpose of the game.