I would probably lean toward Vitali if they really gave it there all, but Wlad is much faster and more athletic so it wouldnt be easy. Would be interesting and slow to develop.....I think Wlad punches harder and with more speed which would lead to more punches you dont see and more 1 punch KOs. Vitali tends to grind down opponents.....

It wont happen, but if it did it would be for huge money and I bet Wlad would win a decision as they would take it easy on each other, IMO.