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.

Optimization · Practiced Mastery
Slapstick physics puzzler about hauling a wobbly ragdoll through dreamscapes.

Execution · Practiced Mastery
A monochrome puzzle-platformer about a boy lost in limbo.
Human: Fall Flat leans Optimization (Practiced Mastery); Limbo leans Execution (Practiced Mastery).
Limbo leans a little harder on execution, though the gap is small.
Human: Fall Flat
Wrestling floppy physics limbs is the joke
Limbo
Tight platforming with trial-and-error.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Human: Fall Flat
No adversary, only wobbly geometry
Limbo
Hazards are scripted.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Human: Fall Flat
Physics jank adds slapstick unpredictability
Limbo
No randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Human: Fall Flat
Puzzle solutions and shortcut discovery
Limbo
Puzzles have fixed solutions.
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.