Neither one knows anything about the other. Khan thinks Cap is going to confiscate his crew's cryo-pods, Cap thinks Khan is going to, I dunno, take away apple pie and baseball forever. I think that's regular morals? Right.
Round 1: Cap vs Khan, pure H2H. No shield.
Round 2: Cap vs Khan, Cap has his shield.
Round 3: Cap + Black Widow vs Khan, Cap has his shield, Widow has her ridiculously small guns, Khan has the weapons he used against the Klingon forces. No morals for all.