Are you, like, completely oblivious to the existence of external factors that change people's look over time?

Zuckerberg: Age difference of what, 10 years? Also different cameras. The pictures on the left were taken with expensive equipment. The right one looks like a phone's selfie cam or webcam which generally have shit quality and distortion from the wide angle.

Dude on the right: Aging, smiling, and one of the pictures is mirrored which our brain has a hard time dealing with sometimes. Try looking at a mirrored picture of yourself, you'll hate it.