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

Optimization · Pure Optimization
A musical adventure where learning and reversing melodic spells forms a closed combinatorial puzzle system.

Optimization · Pure Optimization
A block-pulling puzzle game about solving deterministic 3D climbing puzzles.
Loom leans Optimization (Pure Optimization); Pushmo World 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.
Loom
Musical spell sequences require accurate note input under light pressure
Pushmo World
Pulling and climbing blocks demands no precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Loom
Fantasy narrative with scripted antagonists
Pushmo World
Solo puzzle game with no opponent
Loom leans a little harder on variance, though the gap is small.
Loom
Deterministic world with no randomised elements
Pushmo World
Puzzles fully deterministic, nothing hidden randomly
Pushmo World leans a little harder on optimization, though the gap is small.
Loom
Learning and combining distaff spells in the correct order is a fully solvable logic system
Pushmo World
Working out the pull sequence to climb is the whole game
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.