I suppose if you want your ultimate answer, however, you need to look no further than Uncharted 2. The 360 simply does not have a game that looks as good as that.

It is looking like it is getting t o the point where developers have the PS3's hardware figured out and the games are looking better on it as a result. It is most notable in Dragon Age Origins. The background.objects and textures are clearer on the PS3 than on the 360