What is "better"?
It's all religion, and it's all variable.
There is undoubtably a better choice... but people are so wrapped up in their emotional/financial investment that they can't come to grips with the fact that they may have made the "lesser choice".
As some said, both are fine. Both take pictures well. (however, Nikon still is the high-ISO king and that's pretty much indisputable if you look at comparison tests... Canon should be absolutely embarrassed)
...but then there is the variability. So right now I can say that... but then Canon releases their next model and puts Nikon to shame. (or they could, anyway)
Once you've bought into a system it's best to stick with the system until there is some overwhelming reason to jump.
Me, personally, I think the ergonomics and controls on the Canon are absolutely horrible, and they remain consistently bad because they have to keep from jacking with those used to them... beyond that I can't say much.