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

Execution · Light / Casual
A comedy sandbox testing nothing harder than enthusiasm for collateral damage.

Execution · Light / Casual
A first-person horror about a journalist investigating an asylum.
Kill It With Fire 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.
Kill It With Fire
Swatting spiders needs only loose aim
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.
Kill It With Fire
Spiders scuttle on simple RNG, no minds here
Outlast
Enemies follow scripts.
Kill It With Fire leans a little harder on variance, though the gap is small.
Kill It With Fire
Spider hiding spots are unknown until flushed out
Outlast
Mild patrol variance.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Kill It With Fire
Checklist objectives and weapon unlocks, deliberately shallow
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.