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.

Execution · Practiced Mastery
Story-driven action adventure carried by its banter more than its combat depth.

Optimization · Practiced Mastery
A slow life-sim adventure testing patience, daily routines and light combat.
Marvel's Guardians of the Galaxy leans Execution (Practiced Mastery); Shenmue III leans Optimization (Practiced Mastery).
Marvel's Guardians of the Galaxy leans a little harder on execution, though the gap is small.
Marvel's Guardians of the Galaxy
third-person shooting with generous checkpoints
Shenmue III
Light fighting timing and QTEs, mostly forgiving
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Marvel's Guardians of the Galaxy
enemies follow fixed behaviors
Shenmue III
Sparring AI is scripted, never models you
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Marvel's Guardians of the Galaxy
story beats unknown only on first playthrough
Shenmue III
Where clues and gambling odds land is mildly random
Shenmue III leans a little harder on optimization, though the gap is small.
Marvel's Guardians of the Galaxy
ability priorities and huddle timing are light systems
Shenmue III
Money routines, training grind and clue routing structure the days
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.