I predict Usyk TKO's him now. Usyk is much bigger naturally and surely hits quite a bit harder now than in the ams since he bulked up and transitioned to the pro style. He also would have a better chin. Although Beterbiev proved he has the power to hurt him if he lands clean and probably anyone above 175. And the natural HGH and testosterone levels will be through the roof at cruiser. But his power can't be as dangerous as the people Usyk has just fought at HW who are massive in comparison. Having said that, Beterbiev might have an easier time landing since he has shorter and faster hands than SHW's and can probably get in exchange range easier due to his footwork/speed. Regardless how fast SHW's are they're all still slow compared to a small cruiser or LHW. Watching Usyk KO Beterbiev would be entertaining. Though the slight risk of Beterbiev catching him bad would be a disaster.
Usyk would destroy him. Beterbiev is a natural Cruiser/small heavyweight that was sent into hiding in the pros by Usyk. He did not want to fight him.
Why do you think Beterbiev would be harder to beat than an AJ or Fury? Yes, he KOs everybody AT HIS WEIGHT, but he doesn't have 250lb puncher power like AJ....