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

Optimization · Practiced Mastery
Atmospheric hide-and-seek exploration where knowing the route defuses the horror.

Optimization · Practiced Mastery
Scripted cosmic-horror set pieces strung between modest environmental puzzles.
Among the Sleep leans Optimization (Practiced Mastery); Moons of Madness leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Among the Sleep
Toddler locomotion and hiding need little dexterity
Moons of Madness
Light stealth and walking - minimal physical demand
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Among the Sleep
The pursuing monster follows scripted triggers
Moons of Madness
Horrors trigger on scripted story beats, never adapting
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Among the Sleep
Scares are scripted-but-unknown on a first run
Moons of Madness
Scares and puzzle layouts are unknown only once
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Among the Sleep
Finding memory objects and routes solves each chapter
Moons of Madness
Environmental puzzles are the only real test, and modest
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.