confusing heart with chin is a mistake. margarito has a sick chin. He can take punishment better than almost anyone else. That isn't all heart. He was blessed with a great beard.

Cotto was a guy who got dropped in different fights at 140. He doesn't have an average chin for a guy that has reached the level of the sport he has reached.

Margarito could have all the "heart" in the world but he wasn't given a super natural chin his ass would be getting laid out.