I think up and up between the two Kong will get killed. Nobody has bigger balls nor fearlessness than good 'ol Kong.
But having those traits is not enough when your opponent has armor skin, nuclear breath, and matching strength.
Kong needs to do like Bruce Wayne did in Batman vs. Superman. Kong needs some technological things like a body suit, nuclear cannons, and maybe an AR-15 (not with 10 rnd, mags, lol!) j/k