head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

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

Optimization · Practiced Mastery
An adventure game where solving dungeon puzzles and light combat define the experience.
Assassin's Creed Unity leans Optimization (Practiced Mastery); The Legend of Zelda: Ocarina of Time 3D leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Assassin's Creed Unity
Refined parkour, still forgiving combat
The Legend of Zelda: Ocarina of Time 3D
combat and platforming need moderate precision
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
The Legend of Zelda: Ocarina of Time 3D
scripted enemies, no adaptation
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
The Legend of Zelda: Ocarina of Time 3D
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.
Assassin's Creed Unity
Gear builds and blackbox approach planning
The Legend of Zelda: Ocarina of Time 3D
puzzle solutions and dungeon routes solvable
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.