Zhang probably has better One-Punch power while Dubois is better at landing combinations and knocking out his opponent with a series of punches...
Zhang is such a rarity, an all-time huge punching heavyweight who is a southpaw! Not something you see everyday.
Just going off the Joyce fights, Zhang. Dubois clearly hits hard though, Joyce was very cautious in their fight, he clearly felt Dubois' power and wasn't going to risk taking too many shots like he usually does.
Zhangs left hooks are hard to see coming so they are more likely to KO someone. There's probably not much between these guys, they both hit hard af!