head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, and it is a single point.

Optimization · Pure Optimization
A charming JRPG carried by familiar evolution and party-build routing.

Optimization · Pure Optimization
A physics-puzzle horror game where methodical object manipulation and route knowledge reduce all tension.
Ni no Kuni: Wrath of the White Witch leans Optimization (Pure Optimization); Penumbra: Overture leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Ni no Kuni: Wrath of the White Witch
Hybrid action-turn combat, low input demand
Penumbra: Overture
Physics-based interaction and basic evasion; low precision demand
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Ni no Kuni: Wrath of the White Witch
Scripted enemies
Penumbra: Overture
Dogs follow scripted patrol and alarm states
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Ni no Kuni: Wrath of the White Witch
Familiar catch and drop rolls
Penumbra: Overture
Some item placements are hidden on first run
Ni no Kuni: Wrath of the White Witch leans a little harder on optimization, though the gap is small.
Ni no Kuni: Wrath of the White Witch
Familiar evolution and party routing rewarded
Penumbra: Overture
Puzzle solutions and safe-zone routing are fully learnable
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.