head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, and it is a single point.

Optimization · Pure Optimization
A block-pulling puzzle game about solving deterministic 3D climbing puzzles.

Optimization · Pure Optimization
A puzzle game where photographs layered onto the world physically rebuild missing geometry.
Pushmo World leans Optimization (Pure Optimization); Viewfinder leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Pushmo World
Pulling and climbing blocks demands no precision
Viewfinder
Placing photo layers needs light spatial precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Pushmo World
Solo puzzle game with no opponent
Viewfinder
No opponent; photograph-based puzzle
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Pushmo World
Puzzles fully deterministic, nothing hidden randomly
Viewfinder
All scenes are deterministic
Pushmo World leans a little harder on optimization, though the gap is small.
Pushmo World
Working out the pull sequence to climb is the whole game
Viewfinder
Deducing which photo angle reconstructs the geometry needed to progress
A matching score does not mean a matching test. Two games can both sit at 10 on execution and demand completely different things of you - which is why the reasoning above matters more than the number beside it.