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.

Optimization · Light / Casual
A two-part visual novel that uses a conventional romance setup as a deliberate feint before pivoting to military sci-fi.
Firewatch leans Optimization (Light / Casual); Muv-Luv leans Optimization (Light / Casual).
Firewatch leans a little harder on execution, though the gap is small.
Firewatch
Walking and radio dialogue only.
Muv-Luv
Menu choices only; no physical demands
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.
Muv-Luv
Routes are fully scripted harem-to-military arcs
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Firewatch
Minor environmental discoveries.
Muv-Luv
Minimal hidden information in the first entry
Muv-Luv leans a little harder on optimization, though the gap is small.
Firewatch
Few systems to optimize.
Muv-Luv
Completing Muv-Luv and Unlimited to unlock Alternative is a light routing puzzle
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.