On fight night, in the cage, Usman often looks to be solidly bigger than his opponents. On fight night, in the cage, Masvidal has never looked to be solidly bigger than any of his WW opponents. A reasonable guess would be that on fight night, Usman is 10 lbs bigger than Masvidal, his frame is wider, more muscular, etc. Usman is a big WW, Masvidal is not even a mid sized WW IMO