Marquez has better in-range lateral movement though, which is key to neutralizing Pac's angle and setting up his own. I don't really favor either, but since people keep pointing to JMM's style and Pac's flaws as inherent reasons he'll lose to Floyd, I like to offer an alternative perspective and show Manny's keys to victory. My thoughts from another thread:
Floyd has better footwork than Marquez. Floyd is about twice as fast as Marquez to the punch. Floyd would use Manny's "run in" off balance position to pop him hard. Manny just doesn't have the reach either. Floyd would control distance and range with reach.
Floyd's length can give him outside position even when his left foot is not on the outside. That all has to do with ring IQ and Floyd's ring IQ is levels above Marquez's and worlds above Manny's.
I think Floyd would cruise to a very easy UD12. Pac has his moments but never really gets going. Uneventful, dull fight that ends with a clear victory for Money.