Prime for prime I'm a bias Kostya fan but silly as it may sound I can see Agustus out working and baffling him over 12 what say you classic?
Tszyu would be befuddled by his weird style for a bit then find his range and outclasses Augustus for a wide UD or late TKO with only Augustus’s great chin and survival instincts seeing him last so long. Different class of fighter totally.
Augustus had ridiculous natural talent and was probably robbed more than any other boxer. He stood in front of Floyd Mayweather and constantly made him miss. Did that with everyone. He'd be a handful. With more dedication and management he could of been a great imo
Tzyu by wide decision or late round TKO. Augustus was a small 140 pounder, Tzyu was a big one. Augustus doesn't have the power to hurt him. Emanuel will land plenty of leather, but it wont deter Tzyu.