Butterscotch variants

[Buffy]

Can anyone tell me, if my butterscotches are just faded or if she is any "variant". I mean the one with the orange symbol, she was from UK, so I was thinking, she is perhaps the one who came with gymkhana set?
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The first one is ff, the other two have concave hooves.

[ZennaBug]

I don't know much about varients, but I think they're probably just a bit faded.  The CC and FF ponies look a little different though, I think the FFs look pudgier.

[butterflybuttons]

Looks like fading to me. They do get lovely differences through fading and different batches.

[PinkRosedust]

I have a Butterscotch whose symbols are a similar color. I think they're just faded. =)