What's the deal with Peachy?

[Shileah]

Sorry, another thread from me as I ran into another thing while organising. I have the beginnings of a Peachy army (unplanned, but she is a cute pony so things could be worse!) and some Peachys are different from the others.

Here are all my five Peachys at once:
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The two to the left have different symbols than the other three. Their symbols look "pinker". The one on the very left is my childhood Peachy, it's the Macau version. The one next to it is a regular HK version
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It gets more obvious if you directly compare the symbols:
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Are the different symbol variants something important?

[mlp4me]

Mass produced pony=big variety. Sun will fade pink symbols. There's also a flat foot version. I don't think any one of her is alike.