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.

Execution · Light / Casual
A first-person horror about a journalist investigating an asylum.

Variance · Light / Casual
A first-person psychological horror set in a cursed family home.
Outlast leans Execution (Light / Casual); Visage leans Variance (Light / Casual).
Outlast leans a little harder on execution, though the gap is small.
Outlast
Running, hiding, and camera use.
Visage
Slow movement and item use.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Outlast
Enemies follow scripts.
Visage
Ghosts follow scripted triggers.
Visage leans a little harder on variance, though the gap is small.
Outlast
Mild patrol variance.
Visage
Some scares and item placements vary.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Outlast
Battery and route planning shallow.
Visage
Sanity management is 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.