UCLA is generally considered the better school.
Of course there are some students who pick USC over UCLA but overall UCLA is considered the stronger and more prestigious school.
However, I think that USC has a stronger alumni base and their alumni seem much more passionate and proud about their school than UCLA. I think a lot of that has to do with culture and the fact that SC is a private school (yes, I know bschool is different but I still think state school alumni is just not as strong as most private schools).
In terms of price, I think they are comparable (too lazy to actually look it up).
My Wharton Blog - http://www.whartonblog.com
Wharton MBA for Executives Ambassador - http://gmatclub.com/forum/128-t66295
My Story - http://gmatclub.com/forum/102-t49770