I dunno-I literally do not know enough to make a conclusion-about questions like are you sure the proven master boxer Usyk did not have the chops at combining techniques that Holyfield & Spinks did? Not the combos that Holyfield did, why? He was even more busy, even at HW I believe. You mean he punched & landed more often, but more continually, in less effective bursts/combos? Also Evander stronger than Usyk? Remember CW was only 190 then in 2 stages moved up to 200, I think Evan Fields was definitely stronger due to PEDs. But that seemingly just described HW (& only the upper body). I would favor Usyk, but yeah it is a tough matchup. Oh & due to more muscle as is usual when everyone is pretty lean & must make the same division, Qawu was stronger than EITHER of them at CW. WHat is his real height? Usually I believe I can get a read on this, & usually the shorter height is correct, but 5'5"-5'7" & everything in between is listed for him!
Cruiserweight wasn't Qawi's best weight, so i'd probably favour Usyk in a hard fought decision, but Qawi would push him all the way though. And has the style to make him fight out of his comfort zone.