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.

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

Variance · Light / Casual
An authored branching story; the test is emotional choice, not skill.
Firewatch leans Optimization (Light / Casual); The Walking Dead: The Final Season leans Variance (Light / Casual).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Firewatch
Walking and radio dialogue only.
The Walking Dead: The Final Season
QTEs are forgiving prompts, not a skill ceiling
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 Walking Dead: The Final Season
No opponent; characters react along authored branches
The Walking Dead: The Final Season leans a little harder on variance, though the gap is small.
Firewatch
Minor environmental discoveries.
The Walking Dead: The Final Season
Branch outcomes are hidden on a first playthrough only
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 Walking Dead: The Final Season
Little to solve beyond seeing the story branches
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.