I have a mini-army of Mischief variants. Let me see if I can find the link to the thread as it was a while back now. It's mentioned on my site, because I go into geeky stuff like this:
http://www.etherella.com/scrapbook2/baby_mischief.htmIn any case, I have the following:
China, rainbow tinsel in mane and tail
China, gold tinsel in mane and tail
China, rainbow tinsel in mane and gold tinsel in tail
China, gold tinsel in mane and rainbow tinsel in tail
Hong Kong, rainbow tinsel in mane and tail
NC, rainbow tinsel in mane and tail.
I also know there are minor body shade variations between some of these which may explain your variation too. I think there were a lot of batches. The gold tinselly ones have mostly been located in continental Europe, and they are sometimes a bolder colour of pink with curlier hair. This isn't an exact rule though. The NC has a hairline that is set back further on the head and she's paler. I got my one from a childhood pony lot here in the UK.
I know there is an Explorer with a tinsel variation out there, and HK, NC and China versions for all of the set, so you really could do this forever. But I stuck with Mischief only because I don't have the space to do this for all of them!
My website only has a few of them pictured, but here's the thread with the pictures of all six
http://mlparena.com/index.php/topic,376238.msg1502522.html#msg1502522And my original post when I thought there were only four, as the pictures of those are a bit bigger:
http://mlparena.com/index.php/topic,368763.msg1402544.html#msg1402544