Hi Janine,
I have been reading up on this is as well. Joe Pierce has discussed this a little on his own personal forum, before it was omitted from CS.com, and elsewhere. (PM sent). I will let you read it and make your own hypothesis and then we can hopefully discuss it more. Here are a couple of pictures of the two we own/ed. One of the girls we had (we just sold) is het Amel, Anery. We kept a couple of Ghosts from her last breeding that seem just a little different in coloration then what a regular Ghost would/should look like. Then again this could be explained as just another variance in color from Ghost line to Ghost line.

We will have to see what they turn into as they grow. Here is her picture.
"Rosie" - 0.1 Christmas Hypo het Amel, Anery (SMR)

The second girl we still have in inventory has me a little more intrigued as she is het Lavender, Stripe. Maybe, when paired with the right male, she will throw some babies that will be more identifiable as a "Christmas" mutaion. Who knows, we will have to see next spring. "Rosie" did have some deep red coloration to her saddles but "Holly" is definitely more saturated and is more rich in color. Here is a picture of "Holly" so you can see what I mean. The one thing that I do notice between the two is even though they both have a reduction in saddle border pigment it is not black but more like a dark hunter green in coloration. Is yours like this as well?
"Holly" - 0.1 Christmas Hypo het Lavander, Stripe (Stephen Wagner)

I hope this is what you were looking for.
Jay