There is no better console, some people will prefer the ps3 for its high definiton graphics, six-axis, controller layout etc and some people will prefer the 360 for its nice price, good graphics etc.
Personally I will always buy a playstation over an xbox because i don't like xbox's controller and I've used sony since the playstation 1 came out so I'm just used to it.
So maybe Sony was aiming for a different audience when they made the ps3, same with the 360.
But (and don't argue with me on this), the Wii beats them all