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 · Practiced Mastery
The first Dishonored: a stealth-action playground of layered powers.

Optimization · Pure Optimization
A scripted RPG where pattern-learning and pacifist routing carry you.
Dishonored leans Optimization (Practiced Mastery); Undertale leans Optimization (Pure Optimization).
Dishonored leans a little harder on execution, though the gap is small.
Dishonored
Blink timing and combat inputs matter.
Undertale
Bullet-hell dodging in scripted patterns
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dishonored
Guard AI scripted, non-adaptive.
Undertale
NPCs follow fixed dialogue trees, not adaptive
Dishonored leans a little harder on variance, though the gap is small.
Dishonored
Patrol timings vary mildly.
Undertale
Minimal randomness in encounters
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dishonored
Power combos and stealth routes solvable.
Undertale
Learning fixed boss patterns and mercy routes wins
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.