Even though you like Q more, it's still a fact that Mastamind is a bigger artist. Nobody outside of the internet even knows who Q Strange is. But Natas has had a decent size following since before the net even existed. I've never been able to find one single Q Strange album, or even a spot for his name in a CD store. While Natas has had classics in stock for years.
As for talent and rapping goes, they are two totally different style of rappers. You really can't even compare the two. I really like Q, and probably prefer his style as far as solo shit is concerned. But this is a "what have you done for me lately" game and dude Q Strange hasn't dropped anything in forever.