ivory/black ivory blood python questions...

ok so i see that on the market are many black blood ivory ( brongersmay Xcurtus - from what i have seen). Is there a way i can differentiate the pure matrix x matrix ivorys from black ivorys?
are the made by normal brongersmai or matrix x SSTP ? if i breed a black ivory with a pure ivory what will i get?
i am curios becose i want to get a ivory and i dont what to end up with a black ivory .
any other things u know about black ivorys please let me know.i know they are muts and not desired .
thank you

My best advice on that is to get them from a breeder you can trust and that would be willing to show the snakes used to produce them. I'm not sure otherwise how easy it would be to tell, since they are missing most of their pattern/color. The head scale patterns would probably differ some from a pure brongersmai, but I have no idea to what extent or how much variation there would be depending on what percentage the cross was.