You ought to clarify the question (edit: in the title) because my initial thought was between XIII and Versus XIII, which will. without a doubt, swing in XIII's favor due to its multiplat status. If Versus also turns out to be multiplat then its anyone's game.
As for which platform will sell more copies of XIII it will be the PS3 without contest due to the strength of the name on Playstation consoles, and the fact that it's still Japan-exclusive on PS3.








