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

Execution · Practiced Mastery
Open-world superhero game where an electric courier zaps his way across a quarantined city.

Execution · Practiced Mastery
A monochrome puzzle-platformer about a boy lost in limbo.
inFamous leans Execution (Practiced Mastery); Limbo leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
inFamous
Aimed lightning and traversal under fire
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.
inFamous
Enemies follow fixed AI scripts
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.
inFamous
Open city is static once explored
Limbo
No randomness.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
inFamous
Power upgrade paths and karma route planning
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.