The majority of people would probably say Whitaker by decision. But I believe that it would have been a fantastic fight that Kostya would win, after taking a few rounds to find his rhythm and accumulating damage on Pernell as the fight went on. Tszyu is powerful enough to hurt Whitaker, and has the handspeed to land on Pernell. And I can just picture in my head that Tszyu's way of fighting on the outside and keeping opponents on the end of his punches would be effective.
Would Tszyu land similar punch on Whitaker as he did on Judah? I'm not saing about the chicken dance but the perfectly timed shot landed with full force on the Wihitaker chin causing knockdown?