Tarver's dimensions and southpaw style aren't enough. Qawi gets inside and roughs Milkdud up and wins a clear decision.
Tarver fights way to lazily to beat Qwai. This wouldn't be close. Qwai outworks and out hustles Tarver every round before stopping him late.
Tarver gets the hell beat out of him, Qawi won't respect Tarver's punch which means he'll just run him over with a barrage of power shots
Qawi by comfortable decision... you beat Qawi by either colliding with him and outworking him or by jabbing and moving... Tarver excels at neither of those things and would simply be outworked