This is sort of like asking which came first, the chicken or the egg LOL. First you have to ask where did the co-dom come from and where did the super come from? I suppose the real question is did we find a super in the wild as the first example of the morph? Obviously you can't get a super without the single gene co-dom form first. But then again you can't get a chicken without the egg and you can't get an egg without the chicken LOLOL.