ATG Povetkin has a much better record than Vitali

Vitali's had the better career, barely losing rounds and knocking out almost all of his opponents. Povetkin hasn't dominated so much and has beaten fewer contenders. However, his best wins (Byrd, Chambers, Chagaev) are arguably better than Vitali's (Sanders, Adamek, Solis). Though I'd bet that 2003 Sanders beats Byrd, Chambers and Chagaev.