I think that despite the difference in size, it will be a very close fight, in which long will be difficult to say who will win. I think that will win blonde, but equally likely to win brunette. The blonde is bigger, heavier and stronger. Brown is faster, higher strength and I think she is harder and more nasty. It will be a hard fight, a lot of punching, hair-pulling, scratching and attacks tits and pussies. Lost woman will lick pussy and ass winner, would not be beaten more.
Hmm... I voted for blonde wins, but if I would watch this fight, I would cheer brunette.