I been researching this more. An article talks about PS 3 vs Xbox 360, written by a game developer for both...

Playstation 3 vs. XBOX 360 - A Game Developer's Perspective - hardCOREware.net

I believe he's saying that on paper PS 3 has more potential but in reality it's difficult to take advantage of it so Xbox 360 turns out to be better quality graphics, but he says that maybe eventually PS 3 will have better graphics than Xbox 360.

I'm rethinking this, if Final Fantasy XIII is going to be better on the Xbox 360 I'll buy that version, same for Final Fantasy Versus XIII. This would mean that I wouldn't be buying a PS 3 for games, but I may buy it later for the Blu-Ray player years from now. So I'll probably just get the Xbox 360 again, and play Mass Effect!

I love the Xbox 360 controller! !!!