Johnson is the better fighter, but considering the length of the bout and the condition of Johnson I don't think there is any doubt in the validity of the KO (some say Johnson threw it). Johnson takes a hell of a wack from Willard, you can see the blow land with tremendous force. and at that point in the fight, in the heat - anyone woulda gone down from that.
EDIT: sorry wrong section!
EDIT: sorry wrong section!