These two were the best of their era, and had one win a piece, but never had a third fight! What if they did tho?
It's the proverbial 50-50, either Mace dominates the fight and wears King down to finish him, or King manages to land again. No point to speculate. King had improved compared to the first bout, Mace underestimated his opponent, regardless, it remains a middleweight boxer vs heavyweight puncher type of match.