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
A Revolution-era Paris entry built around dense crowds and open-ended blackbox assassinations.

Optimization · Pure Optimization
A tactical action RPG testing ability sequencing and build choices over reflexes.
Assassin's Creed Unity leans Optimization (Practiced Mastery); Of Orcs and Men leans Optimization (Pure Optimization).
Assassin's Creed Unity leans a little harder on execution, though the gap is small.
Assassin's Creed Unity
Refined parkour, still forgiving combat
Of Orcs and Men
Slowed tactical combat forgives imprecise inputs
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Assassin's Creed Unity
Co-op partners face scripted guards
Of Orcs and Men
Enemy squads follow fixed behaviours
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Assassin's Creed Unity
Fixed sandbox assassinations
Of Orcs and Men
Encounters are authored with little randomness
Of Orcs and Men leans a little harder on optimization, though the gap is small.
Assassin's Creed Unity
Gear builds and blackbox approach planning
Of Orcs and Men
Skill queues, rage management and builds decide fights
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.