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

Execution · Practiced Mastery
A monochrome puzzle-platformer about a boy lost in limbo.

Execution · Practiced Mastery
A first-person exploration game where precise aim and route optimization both matter.
Limbo leans Execution (Practiced Mastery); Metroid Prime Remastered leans Execution (Practiced Mastery).
Metroid Prime Remastered leans a little harder on execution, though the gap is small.
Limbo
Tight platforming with trial-and-error.
Metroid Prime Remastered
FPS aiming and platforming precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Limbo
Hazards are scripted.
Metroid Prime Remastered
bosses use fixed attack patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Limbo
No randomness.
Metroid Prime Remastered
minor drop/damage variance
Metroid Prime Remastered leans a little harder on optimization, though the gap is small.
Limbo
Puzzles have fixed solutions.
Metroid Prime Remastered
sequence breaking, item routing, upgrades
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.