head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, 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
Story-driven action adventure carried by its banter more than its combat depth.
Assassin's Creed Unity leans Optimization (Practiced Mastery); Marvel's Guardians of the Galaxy leans Execution (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
Marvel's Guardians of the Galaxy
third-person shooting with generous checkpoints
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
Marvel's Guardians of the Galaxy
enemies follow fixed behaviors
Marvel's Guardians of the Galaxy leans a little harder on variance, though the gap is small.
Assassin's Creed Unity
Fixed sandbox assassinations
Marvel's Guardians of the Galaxy
story beats unknown only on first playthrough
Assassin's Creed Unity leans a little harder on optimization, though the gap is small.
Assassin's Creed Unity
Gear builds and blackbox approach planning
Marvel's Guardians of the Galaxy
ability priorities and huddle timing are light systems
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.