From the Barker book:
"The super Russo is a blue-eyed leucistic called the White Diamond, probably the whitest of the variety of ball pythons".
I've never personally seen a Russo "in the flesh"-though they look great in pics. I HAVE seen a couple of super Fires, and some lesser lucys. The least white FIRE was whiter than the whitest lesser. That's only my experience, but it jibes with what I have heard from other experienced breeders.
Brad Chambers