There’s a reason why fighters are placed in and mostly stay within weight classes. More weight generally equates less speed, but more strength and striking power.
Khabib can’t take down someone that strong that easily, wouldn’t be able to wrap his arms/legs around him, etc. It would be like fighting Ser Clegane with no sword. All he’d have to do is get a hold of you one time, and he probably could quite literally rip his head off or some other prehistoric Wookie stuff.
