Games like Spot the Diff 3D
Games like Spot the Diff 3D include Librarian: Tidy Up the Arcane Library!, Sizeable, The Room, Hidden Folks, and Boxes: Lost Fragments. We matched them by the tags players give Spot the Diff 3D on Steam (Casual, Puzzle, Hidden Object, Score Attack, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Librarian: Tidy Up the Arcane Library!
Shared: Casual · Puzzle · Singleplayer

Sizeable
Shared: Casual · Puzzle · Hidden Object

The Room
Shared: Puzzle · Singleplayer · Hidden Object

Hidden Folks
Shared: Casual · Hidden Object · Puzzle

Boxes: Lost Fragments
Shared: Puzzle · Casual · Hidden Object

The Room 4: Old Sins
Shared: Puzzle · Hidden Object · Singleplayer

The House of Da Vinci
Shared: Puzzle · Hidden Object · Singleplayer

Morphopolis
Shared: Puzzle · Hidden Object · Casual

Monument Valley
Shared: Puzzle · Casual · Singleplayer

Moncage
Shared: Casual · Puzzle · Singleplayer

Peggle Deluxe
Shared: Casual · Puzzle · Singleplayer

A Little to the Left
Shared: Puzzle · Casual · Singleplayer

Travellin Cats in Paris
Shared: Hidden Object · Puzzle · Casual

Zup! S
Shared: Casual · Puzzle · Singleplayer

Frankenstein: Master of Death
Shared: Casual · Hidden Object · Puzzle

The Room Two
Shared: Puzzle · Hidden Object · Singleplayer

Tiny Lands
Shared: Casual · Puzzle · Hidden Object

Donut County
Shared: Casual · Puzzle · Singleplayer

Shelves and Sorcery: Tidy Up the Enchanted Shop
Shared: Puzzle · Casual · Hidden Object

LEGO® Builder's Journey
Shared: Casual · Puzzle · Singleplayer

hololive Treasure Mountain
Shared: Casual · Puzzle · Score Attack

Little Inferno
Shared: Casual · Puzzle · Singleplayer

Time Lock VR 1
Shared: Puzzle · Hidden Object · 3D

Please, Don’t Touch Anything
Shared: Puzzle · Casual · Singleplayer