Margarito knocked out Cotto because his will was greater then Cotto's.

I admit i was just a little skeptical, but when I watched the Clottey fight and how Cotto was getting tagged constantly and busted up when he couldnt put Clottey away it became clear to me that if that was Margarito in there for a rematch Cotto would have been stopped again. I don't think Margarito would have even needed bricks to beat Cotto that night or when he fought Clottey. No disrespect to Cotto but he just doesn't seem to respond as well to pressure as he did when lesser fighters did it to him.