Hmm, I may have answered my own question ...

I guess this:

http://newenglandreptile.com/nerd/in...-platinum.html

Is "just" an HGW x lesser.

The "soul sucker" evidently has a more light pigmentation to it:

http://newenglandreptile.com/nerd/in...ul-sucker.html

... So it seems maybe the "hidden gene" in that combo is what you might call a "highlighter" gene ..?

Still can't tell if it's a whole separate gene or a different bloodline of lessers (ie, a completely different morph), tho ...