I've probably got this wrong myself but I think they are just different lines of the same mutation from different imported animals.
But I don't know if anyone has really done any work on them as, without a visible super, you would have a fairly hard time proving compatability I think.
dr del
Derek
7 adult Royals (2.5), 1.0 COS Pastel, 1.0 Enchi, 1.1 Lesser platty Royal python, 1.1 Black pastel Royal python, 0.1 Blue eyed leucistic ( Super lesser), 0.1 Piebald Royal python, 1.0 Sinaloan milk snake 1.0 crested gecko and 1 bad case of ETS. no wife, no surprise.