It's an absolute nightmare fight for both. I think either of them can win it, but it's just too hard to pick - you should never really bet against either guy when they fight. Fury has off-nights when he's not mentally focused, but if he's ready and understands what Usyk is going to bring to him, then he can box smart from a distance and use all of his size and reach to put a bit of a beating on Usyk.
Usyk simply won't be denied, though. He's hungrier than Tyson now, and if he figures out a way to get inside and time Fury, then he can do damage. I think it will be a classic fight. Very close, and both guys are going to take punishment. My hunch is that Fury takes it, though. Can't wait.