From someone who has read the many thousands of "xbotz" PS3 suxors cant do 360 graphics has no games blah blah posts over the last few years... I will say that a game should be the best it can be on each platform its released on, However! looking at the screens in general of this game I see no reason why they dont BOTH look better as I find them less then stunning.
But then again JRPG are not really known for mind blowing graphics