I think people are blending two things. Separate overall skill and athleticism. If you do that you will see that Dirrell is very similar athletically to RJJ. Look at Dirrell's speed, ability to dodge punches, and and agility. A young RJJ was a much better fighter because he had one punch knockout power, willingness to trade, heart of a champion, better timing, and utmost confidence. Probably even a few more things that I didn't mention also but athletically Dirrell is a phenom. He just doesn't know it yet. Even Allan Green, who never credits anyone but himself, was saying that Dirrell's talent is the best he just doesn't know how to use it.