I wasn't aware that there were really huge differences in the genes. As far as I know there are only 2 real lines and hence why they go by banana or coral glow but are essentially the same as they didn't prove out different genes.
Being that it's a dominant/co-dominant gene I have to assume the only factors that muddy the color would be the underlying genes.
Just food for thought. I'm sure anyone selling you a snake can show photos of parents.