Heh heh, yeah ...
Well generally games from the first person perspective or the third person "Tomb Raider" perspective are going to be best on a computer, for the simple reason of more buttons and a MOUSE.
I would think the XBox would be the better choice. The hardware is superior. You should end up with better video and that's what everyone looks for. Load times would be slightly quicker as well. Though I still theink the DS2 is better than the XBox controller.