Breed a sugar to a Calico and prove out a sugar Calico by breeding to a normal, if it produces nothing but sugar/Calico looking offspring, then we ask are we able to tell the difference between the sugar and Calico offspring or do they all just look pretty much the same?

If they are alleles of each other and the produce the same looking offspring more or less, it doesn't matter much if they are technically different, just like butter/lesser. But since there hasn't been a proven super Calico, super sugar, or sugar Calico, there is still a chance they are seperate genes completely. I've noticed there is only a handful of reported Calico x Calcio breeding with no follow up of the offspring and I can't find any sugar x sugar or sugar x Calico.

So unless someone is holding back info, there not really much out there to answer if they are the same or not. Can't just go based off looks, examples being the 3 main axanthic lines and the incompatible with common hypo lines.