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

Optimization · Pure Optimization
A perspective puzzle game where objects resize to match how they look when you set them down.
Q.U.B.E. 2 leans Optimization (Pure Optimization); Superliminal 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
Superliminal
Forced-perspective placement 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
Superliminal
No opponent; solo perspective 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
Superliminal
All rooms are deterministic
Q.U.B.E. 2 leans a little harder on optimization, though the gap is small.
Q.U.B.E. 2
Glove-power combinations resolve to clean solutions
Superliminal
Understanding forced-perspective growth rules to size objects into the correct shape
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.