Pics, as promised. Real chain is on the right, fake one on the left:
Front of box. Real on right, fake on left. Main giveaway is to look at the small trapezoids next to "CHAIN" on the real box there is a shiny/reflector aspect while the fake one it's just white. It's obvious if you know how to look. But otherwise a very good copy.
Back of boxes. Some sites have said the giveaway is lack of bar-code on fake but in this case both have it. Real on right again.
Box contents. Real on right again. Takeaway is fake has quick link inside the plastic bag, and the quick link says "11S" while the real one has quick link in SEPARATE clear plastic and has arrows for direction on it. Note also the real package has pink sticker on top, fake does not (in this case).
The chains themselves really do look identical to me.
I hope the summary above is useful.
Caveat Emptor.