Well it's hopeless if you don't care for systemacy of knowledge, as any scientist has to. But as in another thread, I can justifiably call your and Darwin's formulation of Natural Selection wrong, pseudoscience, by that standard of systemacy. If variation is not required for selection, as you acknowledge, then it's out of the basic definition, and you are misrepresenting the workings of Natural Selection for including it.
I would only talk about having an advantage over another if there was a competitive situation, where the one variant influenced the reproductive success of another variant, otherwise to put it that way results in deception. Or otherwise I would talk about advantage as in a relation to the environment that contributes to reproducion, without mentioning any variant at all.
Darwin in his muddled thinking besides requiring variation also required competition in his formulation of Natural Selection applied to people, where he talked about one race or species of man encroaching on one another as the basic working of Natural Selection.
So then you have a very very different looking formulation where it is required that for Natuaral Selection you talk about one variant being better then the other, and the superior encroaching on / killing the inferior. Very very different, and all because Darwinists quite arrogantly refuse to abide by standards of systemacy of knowledge that are simply accepted without question in other sciences.
regards,
Mohammad Nor Syamsu