What separates them from the competition is: 1. handspeed 2. conditioning They basically plow through their opponent and that they get the upper hand has less regard to their technique, but more due to their handspeed. In the Barao and Pettis fight, both Dillashaw and RDA showed terrible fundamental technique. Flailing punches that missed most of the time, but since they had the conditioning and the volume and the speed, it overpowered the more skillful opponent. Even if Barao threw a straight punch and Dillashaw threw a slower looping punch, Dillashaw still got off first based on superior speed. There was nothing Barao could do about it. Same thing with Pettis. Their "footwork" has very little to do with it. They could of stayed static and would still get off first.