The problem is that these are all subjective arguments, which can't be won...our opinions on which planes are Harder or easier to fly are just that, opinions.
This is why I don't take plane choice into account in regards to judging pilot skill as much as I do with flight style. This is also subjective (opinion) however.
This is why objective points like..who killed who more? Who won the duel? Are not opinion based but they are objective facts...This is why we don't give much importance to the fight when only the end result is what matters...
I might like a particular basketball team for their style of play, or the fact that they shot a heavier ball than their opponents, but at the end of the day the scoreboard says who won the game and who the best team was..
TLDR: Numbers are objective and instead of having some opinion based fashion to determine skill, just use numbers, because...they never lie