Here is the skin that I have:
And here is how it is supposed to look:
Presumably, you can just set or randomize your skin until you get a code that puts out these rarities, but I've found the system doesn't always accept randomizations other than the base one you get when you first get the unbox.
Also, for the record, there's more than just a "Snow Leopard" variant. I've seen a black leopard with this skin, a White Tigerbuffed, and a white banana peeled. It doesn't seem many people, especially traders, have noticed this...but I also think this might be the fault of the current systems we have on sites like this. Because sites like this one and backpack.tf just use the default images for these items, it doesn't really show the variations between skins. Even ones that aren't these rare variants are different from one another. A scratch here, blood there, sticker on the barrel instead of the hilt: all these things seem to change depending on the number sequence generated by the skin.
I just thought this was an interesting, unmentioned part of this update worth sharing. Plus, perhaps this necessitates a re-evaluation of how trade sites (and traders for that matter) evaluate the prices and rarity of these sorts of skins. Like I said, presumably, anyone should be able to set these colors themselves, but the painting system tends not to always comply and most people are blissfully unawares of these variant skins.
What do you think? Were you aware of these alternates? Have you seen a few others for different skins? Have you just now realized you've had one of these in your backpack this whole time and didn't even know?