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 first-person horror about a journalist investigating an asylum.

Optimization · Practiced Mastery
Solving fixed grab-hand puzzles between scripted chase scares.
Outlast leans Execution (Light / Casual); Poppy Playtime 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.
Outlast
Running, hiding, and camera use.
Poppy Playtime
GrabPack puzzles and chase sequences ask light dexterity
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.
Poppy Playtime
Toys follow scripted chase triggers, not minds
Poppy Playtime leans a little harder on variance, though the gap is small.
Outlast
Mild patrol variance.
Poppy Playtime
First-time scares rely on unknown scripted events
Poppy Playtime leans a little harder on optimization, though the gap is small.
Outlast
Battery and route planning shallow.
Poppy Playtime
Circuit puzzles have single fixed 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.