The ultimate Doppelgänger match-up pitting the greatest starship captain from both universes against each other. For this case, let’s remove starship crews and resources placing them in an arena forced to battle mano-a-mano. Who would stand victorious?
Mirror Kirk has the advantage of having to defend himself against plots, schemes, and assassination on a daily basis. His universe creates a keen survival instinct.
Since Kirk has risen to his position using his skill and intellect, as opposed to Mirror Kirk’s Tantalus field, he has the advantage of wit.
Both are without their crew, who will handle themselves against an adversary all alone?