I think this is a fairly simple concept.
A fighter generally takes more damage from a 25 minute war of attrition than a one punch on the button in the first.
As much as I am impressed by Cain, I was unimpressed with Herb Dean. JDS looks like he took some career defining damage, and not in a good way, at a few points.
Look how many times JDS did the stanky leg again and tell me that he didn't get flogged so badly his cerebellum went on break.