This was a pretty close battle and both of these fighters are extremely powerful. Dio Brando has the edge in their initial forms and his “The World” Stand is very powerful so Kars wouldn’t have had a chance if not for his ultimate mode. In that form, his regeneration can stand up against Dio Brando’s and more importantly, his speed surpasses that of Dio’s. With his bright sword swings, Kars will be able to take the lead as one slash can be fatal. A prolonged battle would work to Dio’s favor, but I believe that Kars will be able to end the match before it takes too long. Kars wins.