They can't be the same, look at their noses. The one on the right forsure has a thinner nose also look at their facial structure. The one on the left has a more round chubbier face whereas the one on the right has a more chiseled face. Makeup is magic but it ain't THAT magical.
If anything the girl on the left put on a bunch of makeup and ALSO had herself photoshopped a bit on top of that to make her features subtley hotter.
I do think they're the same person. Another possibility is identical twins, but I'm betting they're the same person.
You're right about the photoshop though, the girl on the right has a noticeably thinner face, and I noticed the nose as well. Also, the girl on the left looks like she has some swelling, acne, or some sort of bony prominence on her forehead where it's so shiny.
Or the other possibility is that these pictures may be several months apart, and she lost some weight during that time. That would go along with the married/divorced theme of the picture. She looks bloated in the first picture.