In biology they use terms like "fitness" or "reproductive success" for this. "Superior" is a bit loaded since many people have more or less neanderthal dna.
Also "superior" implies some sort of objective measure of progress that evolution is moving towards. Whereas "reproductive success" better captures the idea that selected biological traits are situational. Always remember that lowly rodents were "superior" to the mighty dinosaurs during the Cretaceous extinction period.