He looked about 6'2 and much smaller than a true super heavy weight like Hrgo (despite him being lighter, he's got a much bigger frame). So he has to fight explosively, without the stamina to maintain it over 12. Kind of like Haye, but I don't think he has the stamina to be elusive and box over 12 either. Whereas the super heavyweights he'll come against in title fights can just stay loose and arm punch most of the time, which still thud as they're big humans.
He basically met his Ray Mercer. He does remind me of Tommy Morrison, fast, powerful, explosive but serious flaws in his stamina, chin and ring IQ. A glass cannon in a nutshell. It was why I thought Whyte would beat Itauma a year ago, I thought a similar fight would have occurred as Itauma was even more unproven at the time.