Usyk`s body is far more defined than Spinks was and he weighed 215lbs v Chisora, that`s almost Tyson`s prime weight and now Usyk has put on more weight, the cruiserweight miniumum weight is 200lbs now so Foster would be a modern light heavy at 188, that`s a big gap and Foster looked far skinnier than Usyk at heavyweight, in fact Usyk weighs more at heavyweight than Frazier did and he`s heavier than Ali was in some of his fights during the 60`s when he only weighed around 212lbs, he`s certainly heavier than Cooper who floored Ali once.
AJ ain't slow, but he will be slower than Usyk. He and Chisora have different styles and strengths, Chisoras Joe Frazier impression style is better suited to give a guy like Usyk trouble, but Usyk still beat him decisively (had an easier time with him than 2 top 10 heavyweights) Usyk also has significantly better stamina than AJ.
