i would think of it as fair. i mean think about it, in a way they're both revolutionaries for they're race. eminem broke barriers with being a white emcee, and 2pac has the black panthers in his backround. so really eminem is a revolutionary for the white race and 2pac is a revolutionary for the black race. i think that makes them even.

on top of that maybe eminem is selling more records only cuz he's white but maybe 2pac's selling more records only because he's dead along with all the "alive" conspiricies.