Yeeaaapp.... going with the touched-up symbol scenario....
Just got her out of storage again and the other side is just the same with little uniformity. My hubby has a keen eye for such things (being in the design industry) and I got him to have a look and he's of the same conclusion.
I have loved my original Snowflake over the years, but I don't need two... and personally as a collector I am very much about retaining originality in ponies (I don't alter them/touch them up to restore them), so I'm going to let her go (symbol disclosure included, of course!!
).
Thanks again for the input everyone - this has been an interesting exercise!