It doesn't matter which one you pick bruh, at some point she WILL drop the n bomb on you or say some racist shyt.
If the nerdy girl is actually smart then I'll pick her I guess. I've met a few white people that seem to "get it". They seem very aware of their whiteness and are somewhat cognizant of the complexity of racial relations...or they just have some fukking common sense. Either way that's the one I'm fukkin with.
The PAWG that's on some reverse uncle tom shyt is the one that's usually the first throw a brother under the bus. UNLESS her whole cultural context is black. I.E. Her friends growing up were mostly black, her family is really tight with black folk and she may have some here and there in her family tree like a niece, cousin or nephew that's black or a black grandparent. Those ones are less quick to screw you over. If that's what the OP means, then yeah I'm picking that one over the nerdy girl.
Seriously, homeboy needs to clarify what he means by she "acts black"