I think this would be an absolute war. Moon was a rock hard caveman but could be hurt by someone of Romero's power. However, I would consider Moon just a bit higher class than Romero, though Romero was finely schooled and obviously had big power. I would predict a Moon TKO after a give and take war. I'd be interested to see @PhillyPhan69's view, since he is quite educated on Romero.