This is something I've often thought about.
I think the advantage for the female is the size. Its gunna be hard for an unskilled guy of that weight to get out of a pin. The weight advantage is on her side, I'm about the same size as this guy, and I remember when I knew nothing about wrestling, I had no chance against a girl who had 15kg on me, i couldn't even move her.
Its also going to be a lot easier for her to move the guy, because he's only 63kg. Additionally he's going to have a tough time submitting her, of which only someone with some skills at least could do.
I have to say I think the female would win, easily.