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
The Wii and PSP entry reworking Tenchu into deliberate puzzle-flavored shadow stealth.
Dishonored leans Optimization (Practiced Mastery); Tenchu: Shadow Assassins leans Optimization (Pure Optimization).
Dishonored leans a little harder on execution, though the gap is small.
Dishonored
Blink timing and combat inputs matter.
Tenchu: Shadow Assassins
Simplified controls shift weight off raw dexterity
Dishonored leans a little harder on reads, though the gap is small.
Dishonored
Guard AI scripted, non-adaptive.
Tenchu: Shadow Assassins
Guards follow rigid scripted vision cones
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dishonored
Patrol timings vary mildly.
Tenchu: Shadow Assassins
Little randomness once a level is scouted
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.
Tenchu: Shadow Assassins
Shadow paths and tool use make missions puzzle-like
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.