Ngannou is a striker not a boxer, so Ngannou would take unnecessary punches and punishment, I don't know if with training Ngannou could reform his striking into intelligent defensive boxing because he's already has bad habits boxers would exploit, Wilder knocks him out, he stops him early because Ngannou would just open up & trade and get clipped Wilder has stopped everyone except Fury who's the best right now that has Ali skills, but just because the best in this area beat Wilder 3 times doesn't mean everyone beats Wilder including UFC strikers, Wilder did knock Fury down a couple of times and almost had Fury out cold especially in their first fight Ngannou isn't as big as Fury nor is his chin as solid.