If anything his huge calves as a black man were what made him a freak. The rest of him was big but nothing we haven't seen on others since and better (Zack Khan, Big Ramy, Coleman).
Coleman, in terms of freakiness, is the only one comparable to Dillett, for sure not two overrated oilbags like Zack Khan and Big Ramy, Dillett had far freakier arms, calves, shoulders than both and an infinitely better structure with the craziest shoulders to waist ratio of all time, and he was taller than all of them...
I can't see what's the deal with Mentzer, dude looked average for a pro from his era. Plus, he was fifth, not second, robbed by Arnold lol.
This, Mentzer was also not at his best at the 1980 Olympia, he was dense as usual but near Arnold he looked like a school boy, smooth and no pecs, also the only one on stage with a distended stomach... Arnold dwarfed him and was more conditioned (Arnold was absolutely not smooth, totally the contrary, if anything he overdieted), conditioned size win shows...