head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Pure Optimization
Puzzle sequel where glove powers paint blocks to solve physical room logic.

Optimization · Pure Optimization
A puzzle game where photographs layered onto the world physically rebuild missing geometry.
Q.U.B.E. 2 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.
Q.U.B.E. 2
Occasional timing on moving blocks only
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.
Q.U.B.E. 2
No adaptive element exists
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.
Q.U.B.E. 2
Deterministic puzzles with full information
Viewfinder
All scenes are deterministic
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Q.U.B.E. 2
Glove-power combinations resolve to clean solutions
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.