Klitschko is a completely different type of fighter. Klitschko ain't a brawler like McCall, so you can't compare the fight with klitschko to this. Klitschko put Joshua down, but he didn't finish him off. Why? Because he didn't want to take the risk and felt it was better to go the distance and win comfortably on points. McCall wouldn't think that way. If he had Joshua in trouble, he'd just go and use even more of the tank up, and just continue brawling him until it was over. It's pretty clear that Joshua struggled with a small, good chin scrapper like takam. It's therefore safe to say that McCall, who is similar to takam but with a slightly better chin, more aggression and more power in his punches is gonna give joshua a war, and he has a great chance of winning that war.