How do I know which one is the authenthic one of my Celine AUDREY sunnies? Or are they both authentic 
wondering

wondering

wondering
I attached some photos of them both, so you can see it. One of them comes with a soft case in black, and the other one comes with a white hard case.
The first one with the black soft case I bought it in Sweden for auction and the second Celine Audrey I bought that recently, also on an auction in Denmark.
The seller bought it 6 months ago, in Copenhagen, she called it CELINE LARGE SC 1755 Black Sunglasses.
The one with the black soft case is much harder plastic and more robust and hard whereas the other one has more thin and more flat form not heavy plastic. Also when I feel around with a finger the first one with the black soft case has more round edges, whereas the other one has more flat egdes
1. (with the black soft case) more blue, darker glasses, not that that transperent,
more harder plactic around the sunglasses, more round edges, darker surface
2. (with the white hard case), more redish and transperent glasses, more sharp
flat edges in front and back.
So which one is authentic, could it be the first one (with the black soft case) is the old model or is it vise versa? Hope somebody could help me.