Walking away, despite his (the loser) persistence to keep the fight on, especially since you knew/saw you were obviously wining the fight, would have , in my opinion been the highest demonstration of strength.

Never thought of that before (maybe I did but not for this story), this is a very intereseting perspective, thank you.

Yeah, in that regard both of them are mentally strong. A truly weak person will submit to his pride and would only stop after killing the other...

Humans can be so complicated~