While others have given you advice based on the colors in these photos, I think the issue with using photos is that the difference may just be different lighting conditions and white balances of the photos and not directly translatable to how different the bags are in real life. I can see the hardware also has very noticeable color differences, and assuming both are Gold hardware this may suggest that the photos themselves are not very equal…are these by different sellers? Had it been the same seller I’d ask for direct side by side photo for a better idea…
Indeed must be the lighting, i have also just noticed the hardware gold differences. Yes same reseller but its virtual consign she doesn’t have the birkins in her hand so unfortunately unable to compare side by side. She have only sent me more of the Stamp D pics as below.


Both are same Birkin Stamp D