Not even a contest - Orlando
The parks are much better (WDW craps all over Disneyland), it's much easier to get around (SoCal traffic sucks!), and there's way less "attitude" among the park visitors, particularly the locals. I know some would bemoan the fact that there's nothing like SFMM in Orlando, but I'd also count this as an extreme positive, having been to SFMM...
dt