Based on ratings out of 10 for certain aspects of boxing we can estimate the following This content is protected Not the longest arms but this is nearly nullified by tremendous infighting ability possessed by both. You're looking at maybe a 10"-15" disadvantage in reach to HW's like x2Klitschko and Lewis which would be difficult to get passed, however not impossible given the increase in other boxing aspects covered below. This content is protected In todays boxing world you're looking at many fighters above 6'4". These fighters would have to rely heavily on controlling the fight via a vastly superior jab and outside fighting ability. Even then, the fight would arrive on the inside at some point and an titanium chin would be required to negate the following aspects covered, most notably the aspects of speed and power. This content is protected Tyson's chin, not spectacular, but not too shabby. Tua's chin, can't get much better. The ability to walk through anything any fighter throws at you is a tremendous benefit. Tyson was forced to utilize constant head movement, that ability combined with the ability to just not give a **** and walk right into anything without fear would make a near unstoppable machine. This content is protected The speed, footwork, and head movement of Tyson was something to be admired. With the chin of Tua and defense of Tyson combined you're looking at an unstoppable fighter, period. Accumulation of punches means nothing (see:Ibeabuchi-vs-Tua) assuming you could even land that many flush punches. This content is protected Tyson = physical freak, this is assuming we are not adding any aspect of Fat Tua into the equation. Either way, you won't see the tall fighters dipping down to go to the body, putting themselves in the way of a deadly hook or uppercut. This content is protected In my opinion Tyson's excellence came more from his hand speed and movement, than his raw punching power, which was still damn good. It was more through movement and range of combination punching and speed that overwhelmed his opponents. Tua's speed on the hooks was not to be understated either. But in the HW division, Tyson's hand speed was tops. This content is protected Lack of an unstoppable jab is all that is missing from this fighter. The jab could be effective but on the whole, against fighters with 10"+ in reach advantage would be merely a throwaway punch. Hooks, uppercuts, straights, combinations and body punching would be king. This content is protected Debatable. But I think most can agree that this would be a weak point salvaged only by Young Tyson's relentless approach under the guidance of Cus. Could go into much more detail. Forgetting a lot I'm sure but basically you're looking at: Lowest-60/80 Highest-65.5/80 Comparisons to other fictional boxers (IE: V.W.Klitschko) to follow. Disclaimer: All points are subjective and open for debate. Do not be angry or hostile thinking that I give a damn. Healthy debate encouraged.