Even though Usyk>Haye in many many other ways, in these 2 fights it boils down to one key attribute IMO Usyk was fearless and took risks every minute of every round. Haye bottled it and didn't take a single risk until round 12.
And Usyk would fight someone in the car park of their local pub ... if that's what it took to get the fight made.
That was pure prime Klitschko in there, with a top coach like Manny Steward. Hard to compare it to Joshua. Same with Haye and Usyk. And let's not forget that Haye was 30 years old when he fought Klitschko, who was 35 years at that time(still in his very prime). And let's not forget that Haye switched to HW at 27 years old, and had 4 fights to get into it. Usyk turned at 32 years old, and had a lot of setbacks with injuries, undergo surgery on his hand, and had just 2 fights, which wasn't a great warm up. Let's not forget that the time Usyk fought AJ, he was just 4 months of his 35 birthday, and Joshua is 2,5 years younger than Usyk. So no comparison at all, and Usyk did the absolutely impossible taken everything into the consideration. Tho saying all that i liked Haye a lot, and i think he was a great, great explosive fighter with incredible speed and reflexes.