Who was harder to hit?

Ali rarely got hit until after a 3 and half year lay off.

 

Ali

 

In his prime/Clay days definitely Ali, it's as much a matter of styles as physical ability.

 

That's a damn good question. Lol. I'd go with Ali, because he stayed on his toes and used the ring to his advantage.

 

Ali. Not only did he have the great head movement but he had the footwork that would frustrate the hell outta his opponents. Tyson could move very well bobbing & weaving but overall I think he's an easier target though his defense especially in his prime is not a thing to sleep on.