Unfortunately so, they are not the same dress They are very similar, but if you compare them, you can see discrepancies. The so-called "color-changing" dress has shorter sleeves, and while they both have a similar color scheme (if the dress is seen as black and blue), the blue in that dress is clearly darker and the frills are also variant.
I'd really love to continue the argument but that is why I made my comment before, to close it. I do appreciate your input, though.
the longer sleeves is a jacket ya know..