1. The black chain In the mid of Right red necklace.
2. The cheery like bud under purple neclaces.
3. The orange under purple necklace differ in size.
4. Left Top orange like is missing.
5. Wall shadows marked in rectangle in images.
6. Small dot on wall left top.
7. Half ring like shadow on wall.
8. Purple neclace with cubes have one in oval.

All differences are marked.

Great contest.
Had fun.