honestly i think that in a blind test the vast majority of the world population coudn't tell the difference between the ps3 and the x360 version of almost every multiplat game.
come on: you have to take a snapshot of the game...increase its size...and THEN you discover that the x360 (or the PS3) version has SLIGHTLY sharper textures.
Please accept the truth (=99% of the multiplat games are from a practical point of view completely identical) and stop this madness.