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.

Execution · Practiced Mastery
A Pixar-styled action adventure about a spirit guide cleansing a corrupted forest.
Assassin's Creed Unity leans Optimization (Practiced Mastery); Kena: Bridge of Spirits leans Execution (Practiced Mastery).
Kena: Bridge of Spirits leans a little harder on execution, though the gap is small.
Assassin's Creed Unity
Refined parkour, still forgiving combat
Kena: Bridge of Spirits
Parry and dodge timing in boss fights
Kena: Bridge of Spirits leans a little harder on reads, though the gap is small.
Assassin's Creed Unity
Co-op partners face scripted guards
Kena: Bridge of Spirits
Corrupted spirits are fully scripted
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
Kena: Bridge of Spirits
World is fixed and explorable
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Assassin's Creed Unity
Gear builds and blackbox approach planning
Kena: Bridge of Spirits
Rot ability usage and boss pattern learning
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.