Tough to tell the differences from the picture,s could be just a difference in the larger bottle versus the smaller, or just general differences in the glass production.
That said, how do you know that this reputable basenoter didn't knowingly swap you a fake? 1 Million is an often talked about fragrance on here, and is one that to anyone who spends time on here knows is very frequently faked. The BN marketplace maintains its integrity based on the feedback system so when fakes are swapped or sold and the buyer doesn't appropriately report it, the integrity is compromised. So I really must ask, how do you know the swapper didn't knowingly send you a fake?