Its weird but it does make sense with all the repromotes--use the same formula as before, slap a new name on it in a new collection (ie Parrot also released as Kicky Blue).
Just compared with my N lipsticks and they are also AA7 so IMO wherever they made it, they messed up with the labels and you have a "new" product just under the old name. I would trust that its identical as MAC would have a better handle on repromotes and dupes than sometimes we would.
But thats good to know, anyone who loved Languish should get 4N!