I'll tell that joke I heard one time again:

What do you call a high contrast albino?

A baby.
There's certainly something to be said for line breeding but otherwise its just a issue of whether the animal comes out with a patten that lends itself to fading or holding color.

Now, I do think that combining the albino gene with other mutations can consistently produce high contrast or faded albinos.......I forgot which albino combo came out that looks like a extremely faded albino...