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.

Optimization · Light / Casual
A first-person mystery about a fire lookout in a Wyoming forest.

Variance · Light / Casual
A one-sitting horror walk that tests nothing beyond willingness to continue.
Firewatch leans Optimization (Light / Casual); The Park leans Variance (Light / Casual).
Firewatch leans a little harder on execution, though the gap is small.
Firewatch
Walking and radio dialogue only.
The Park
Walking forward is the entire interaction
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Firewatch
No adaptive opposition.
The Park
Scripted scares with no adaptive presence
The Park leans a little harder on variance, though the gap is small.
Firewatch
Minor environmental discoveries.
The Park
The story is fixed, merely unknown the first time
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Firewatch
Few systems to optimize.
The Park
Nothing to solve - a guided narrative tour
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.