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 horror about exploring a haunted Prussian castle.

Optimization · Systems & Chaos
Trial-and-error survival through scripted horror events that memorisation defuses.
Amnesia: The Dark Descent leans Optimization (Light / Casual); Mogeko Castle leans Optimization (Systems & Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Amnesia: The Dark Descent
Stealth and hiding, low demand.
Mogeko Castle
Occasional chase sequences need only basic movement
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Amnesia: The Dark Descent
Monsters follow scripted patrols.
Mogeko Castle
Pursuers are scripted horrors, not adaptive minds
Mogeko Castle leans a little harder on variance, though the gap is small.
Amnesia: The Dark Descent
Minor encounter variation.
Mogeko Castle
Deaths come from unknown-until-triggered scripted events
Mogeko Castle leans a little harder on optimization, though the gap is small.
Amnesia: The Dark Descent
Oil and sanity management is shallow.
Mogeko Castle
Trial-and-error route knowledge solves the castle completely
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.