That was a different Mayorga that would easily be a toss up against Margarito, and he was a much bigger puncher which gave Forest the problems he did, Mayorga also is able to land from the outside, or was able to in his prime. Also Mora sparred with Margarito I know its not the same thing, but watch this.
http://www.youtube.com/watch?v=O_uQLwuTeOQ