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
Scripted cosmic-horror set pieces strung between modest environmental puzzles.

Optimization · Practiced Mastery
An atmospheric mood piece with light puzzles, testing patience more than skill.
Moons of Madness leans Optimization (Practiced Mastery); Superbrothers: Sword & Sworcery EP 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.
Moons of Madness
Light stealth and walking - minimal physical demand
Superbrothers: Sword & Sworcery EP
Simple timed parries are the only dexterity ask
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Moons of Madness
Horrors trigger on scripted story beats, never adapting
Superbrothers: Sword & Sworcery EP
No opponent - a mood piece, not a contest
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Moons of Madness
Scares and puzzle layouts are unknown only once
Superbrothers: Sword & Sworcery EP
Moon-phase secrets are hidden until discovered
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Moons of Madness
Environmental puzzles are the only real test, and modest
Superbrothers: Sword & Sworcery EP
Light environmental puzzles with gentle 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.