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
An aimless physics sandbox about flinging objects around a 3D room.

Optimization · Light / Casual
A first-person mystery about a fire lookout in a Wyoming forest.
Das Balkonzimmer leans Execution (Light / Casual); Firewatch leans Optimization (Light / Casual).
Das Balkonzimmer leans a little harder on execution, though the gap is small.
Das Balkonzimmer
Aiming and flinging objects is loose, low-stakes
Firewatch
Walking and radio dialogue only.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Das Balkonzimmer
No meaningful adaptive opponent to model
Firewatch
No adaptive opposition.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Das Balkonzimmer
Physics outcomes vary slightly but nothing hidden
Firewatch
Minor environmental discoveries.
Firewatch leans a little harder on optimization, though the gap is small.
Das Balkonzimmer
No real systems to solve or win condition
Firewatch
Few systems to optimize.
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.