A couple quick things. First off, from your original picture, it looks like it came on a card. Was that the original card? What was the SKU? Secondly, this pin is an open stock pin. Just looking at the basic description on PinPics, I can see that there is at least two confirmed issues of this pin, the original in 2005 and at least one in 2008. Disney can keep making open stock pins for years and have done so in the past. This creates several unique runs and yes, they will vary between production runs. They are not always made by the same factory. Subtle differences between the runs is common and expected.
I saw the negative feedback you left for the seller and saw the pic where you pointed out the differences. To be honest with you, those are all changes Disney could have made between runs of the pin to cut down on the cost.