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

Execution · Light / Casual
A joke shooter testing little beyond willingness to laugh along.

Execution · Light / Casual
A first-person horror about a journalist investigating an asylum.
GentleMoon 2 leans Execution (Light / Casual); Outlast leans Execution (Light / Casual).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
GentleMoon 2
Basic aiming at slow zombies, nothing demanding
Outlast
Running, hiding, and camera use.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
GentleMoon 2
Joke enemies follow simple scripts
Outlast
Enemies follow scripts.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
GentleMoon 2
Item locations are unknown on a first run only
Outlast
Mild patrol variance.
Outlast leans a little harder on optimization, though the gap is small.
GentleMoon 2
A short fixed checklist of items to collect
Outlast
Battery and route planning shallow.
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.