DC is great and all but I don't think he's on Volk's level tbh, cardio isn't the best, Jon had a 12.5" reach advantage and DC's biggest strength is wrestling.
BJ Penn was a Lightweight for most of his career, only fight at 170 he had before GSP was Matt Hughes. GSP beat him by SD the first time, it's kind of like the Islam vs Volk situation. 155 is BJ Penn's division, 145 is Volk's.
Guess we can agree to disagree on this one because I don't think they did have their Volkanovski's, Volk is crazy good. He looked damn near unbeatable before fighting Islam.