Fury has the advantage of hitting hard enough but is not very good at physical endurance, Usyk can use this to beat Fury, but we don't know whether Fury can be beaten because he also has pretty good fighting history.
So far, only one boxer has succeeded in making Fury fail to win, ending in draw and that is Deontay Wilder and their fight is the best in history in heavyweight combat.
Fury can definitely get knocked down, we've already seen it a few times. But he'd always just spring back up and win a fight. He also had some controversial wins, like the first one against Wilder that you mentioned or his last one against Ngannou. But he has a perfect personality for this profession. He truly believes that he's meant to be the undisputed champion, which gives him extra powers.
As for Usyk, his technique is second to none, but the size disadvantage will be the major factor here. You don't need to be an expert to know that Fury's main tactic will be throwing a LOT of jabs to keep Usyk at a safe distance.
The odds are quite close. Currently 1.76 for Fury and 2.12 for Usyk. I expected Fury to be more of a favourite, but maybe that fight with Francis played a role here.