With 9 title defences. He was also much younger. yet Mitchell is "not ready" to face a contender yet, but one day will rule the division? :think
Tyson peaked extraordinarily early and faded just as quickly. I don't really see your point. Being undisputed in your early or mid-20s is absolutely magnificent but it shouldn't be expected from upcoming contenders.
Tyson had also been in the sport since his youth. Whereas Mitchell got into the sport in his 20's and his KO percentage is nearly as good