man dunno who would win that fight but dang would be a awesum match up to happen...i thinkkkkk .tyson in his prime simply because he had fantastic speed and elusivness and explosive power in his prime.....tuaman while having a huge heart and rock solid chin just doesnt have the complete package like tyson did....but both lose to lewis easily albeit at least tyson tried to fight against lewis where tua was a disgrace