360 will have exclusive single player expansions packs and exclusive multiplayer content. New details from the Microsoft-Rockstar deal show PS3 will only be able to offer single player content(weapons, clothes, cars) NO extra missions and NO multiplayer extras.
There has been talk of the 360 version having multiple disc and the PS3 version only having 1 disc. This has NOT been confirmed. Even if the 360 version had 2 disc’s, it would also probably have an option to install the contents of the 2nd disc onto the harddrive.(no more disc swapping)
If you are going to play offline, sure go with the PS3 version, you wont be missing anything.
If you are going to play online, 360 version will be best.
I have both consoles, but I will be buying the 360 version.