Hm, but skills need to be proven and tested, and overcoming a big weight disadvantage is the biggest test there is for skills, outside of fighting great fighters. And Walker tested his against both (at lhw and hw and Greb) better than Robinson - as crazy as it sounds. I´m not argueing for either one beeing more skilled, I think different styles need different skills and due to that "skill" is hard or impossible to be compared when fighters have different styles - like here.