head to head
Silent Hill 2 asks more than Firewatch, and the gap is execution.

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

Execution · Light / Casual
A psychological survival horror game where atmosphere and puzzle-solving matter more than combat.
Firewatch leans Optimization (Light / Casual); Silent Hill 2 leans Execution (Light / Casual).
Silent Hill 2 leans clearly harder on execution.
Firewatch
Walking and radio dialogue only.
Silent Hill 2
clunky combat with modest execution demand
Silent Hill 2 leans a little harder on reads, though the gap is small.
Firewatch
No adaptive opposition.
Silent Hill 2
enemies scripted, not truly adaptive
Silent Hill 2 leans clearly harder on variance.
Firewatch
Minor environmental discoveries.
Silent Hill 2
fog and enemy placement randomness
Silent Hill 2 leans a little harder on optimization, though the gap is small.
Firewatch
Few systems to optimize.
Silent Hill 2
puzzle logic and resource use are solvable
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.