Their styles are really hard to master and make it your own. Just look at their legs. Tyson's thighs were massive and rock solid giving him the strength to do the peekaboo style footwork. Manny has stupid genetics on his calves which gives him the spring he needs to keep moving, cutting angles, and popping those awkward shots. His cardio is also insane which enables him to go for all rounds.
Inoue's boxing technique is basically a fencer's technique...heavily reliance on stance, quickness, and distance control. Although the elite punching power is all boxing from a prodigy.
There's a clip of Ali and Cus where they are playing around etc. Cus starts explaining the peekaboo style while playfully trying to jab Ali. Considering Tysons power and speed, I dont know who Id take in that fight.