No question. ANY live body would SHATTER Wilder's glass jaw. Wilder is a fraud. Joshua would KO him early. But don't expect WIlder's management to put him in with a guy like that. They want to cash out getting his fragile mandible exposed against Wlad for the big bucks.
I would pick Joshua by KO/TKO but Wilder has a chance of catching Joshua and stopping him too. I would be very surprised if this went the distance.
I'd favour Joshua because he makes less mistakes and also has a bad ass couunter which I feel would take Wilder's head off the first time he missed one of his hayemakers.
Please, wilder would dance around Joshua and get a late TKO victory. Wilder showed his boxing ability against bermane stiverne. Joshua hasn't shown anything other than he can beat bums.
It took Wilder over 30 fights to face somebody of Stivernes calibre. Stiverne isn't even a top ten heavyweight.