My first post on this forum
About phantom and mystic being the same gene with just 2 different names... I think its possible, especially when considering super forms and combinations with other genes.
In the big morph list
http://www.worldofballpythons.com/morphs , if you look at super mystic, super phantom, these two look very similar. And phantom mystic also looks very similar. Combinations with butter or mojave already prove that both mystic and phantom are on the same chromosome / locus.
If phantom and mystic would really be 2 different genes, i think the super-forms and the phantom mystic should reveal it. But in my eyes, they dont.
For something different that also appears to be on the same locus, try mahogany. The super form is a paternless black like a super cinny or super black pastel. With the important difference that its on the same chromosome/locus as butter, mojave, special, russo, phantom/mystic, so you can get awesome stuff. like the black potion, the mahogany mojave, which looks like a really REALLY dark mystic potion. For just a simple 2-gene combination, mahogany mojave is really dramatic. Mahogany is unfortunately very rare and i have no clue where to get that morph. I guess in comparison to cinnamon or black pastell, mahogany, while being similar on its own, just wont interact as well with pastell.
whats also curious about mahogany mojave is that super mojave = blue eye lucy white snake, while super mahogany = super cinny-like black snake. And the combination: black-yellow-light grey.
Best regards, and if anything i write about genetics is wrong, please point it out, i want to learn from mistakes if i make any.