gotta go with lewis. prime tyson looked so good because of who he was hitting back then. tyrell biggs(no punch, weak chin) tony tubbs (featherfisted and overweight) frank bruno (no stamina, weak chin) carl williams (weak chin again) michael spinks (one of the greatest lightheavyweights of all time, but not a heavyweight). its not that lewis has fought great opponents, but you judge who is the best when they fight the other worthy fighters of their generation. tyson was indeed passed his prime when he fought lewis, but so was lewis. tyson was even passed his prime when he fought holyfield, but again so was holyfield. lewis fought and beat tyson,holyfield, and tried desparetly to go bowe in the ring(whom he had already beat for the gold in the olympics).lewis was just the better fighter. lewis would have exposed what those fighters in the 80' that tyson knocked out couldnt, his lack of mental strength and heart. tyson has to be one of the most overrated heavyweights ever. he barely cracks the top 20 of most boxing historians/experts lists.