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 · Practiced Mastery
A simple licensed dungeon crawl testing patience more than mechanical skill.

Execution · Practiced Mastery
A first-person horror about a cult in the Arizona wilderness.
Adventure Time: Explore the Dungeon Because I Don't Know! leans Execution (Practiced Mastery); Outlast 2 leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Adventure Time: Explore the Dungeon Because I Don't Know!
Simple beat-em-up swings with little twitch pressure
Outlast 2
Chase sequences demand quick movement.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Adventure Time: Explore the Dungeon Because I Don't Know!
Dungeon monsters follow scripted behaviour
Outlast 2
Cultists follow scripts.
Adventure Time: Explore the Dungeon Because I Don't Know! leans a little harder on variance, though the gap is small.
Adventure Time: Explore the Dungeon Because I Don't Know!
Floor layouts and drops shuffle modestly per run
Outlast 2
Some encounter variability.
Adventure Time: Explore the Dungeon Because I Don't Know! leans a little harder on optimization, though the gap is small.
Adventure Time: Explore the Dungeon Because I Don't Know!
Token spending and character picks are shallow planning
Outlast 2
Route memorization aids survival.
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.