Ok I think you're right these are "Parks" dresses, and the Anna dress is one she wears in the new Festival of Fantasy Parade in WDW, and is also sold in Epcot as well which is were this photo apparently was taken
Plus there are 2 different Disney store versions of the dress for Both Anna and Elsa, and 2 more variations of each sold in Kmart, Wal-Mart, Target, and Toys R Us, and 2 variations of each sold in the UK...
So there are at least 7 versions of Elsa's dress and 7 different Anna dresses, all of which official Disney licensed with the plastic picture emblem on them, and there are few unofficial ones for sale as well