Christina is much better looking in my opinion, and it's no question that she would dominate Kim in the titfight.
I wouldn't immediately dismiss Kim in the catfight though. Like Smokey said above, I see Kim fighting much much dirtier than Christina. Kim gets hold of Christina's hair and yanks her down, following up with some quick punches to the red head's face that puts her on the ground. Once Christina is on her back, her massive melons are nothing but a padded seat for Kim's enormous ass. Kim squashes Christina's tits under her ass, then backs up for a facesit that is too much for any woman, including Hendricks to handle.
Hendricks would have to work very hard with her large, albeit extremely sensative, tits to smother out Kim, but once Hendricks knocked down it's a cakewalk for Kim to put her away.
