I like both fighters but Trinidad's fighting style is all wrong for Cotto. Cotto will most like outbox Trinidad early but the longer the fight lasts the more we will see Trinidad starting to land his vicious shots and eventually outlast and stop Cotto late. Cotto has problems against aggressive fighters that don't stop throwing and Trinidad was an aggressive machine with destructive power.
i think tito takes this, cotto would be competitive but he has stamina issues and tito had unreal stamina and punching power that lasted well into the late rounds. i think cotto would go out on his shield and get tko'd in the late rounds.