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

Execution · Practiced Mastery
Arcade dogfighting reflexes against scripted enemy flight patterns.

Execution · Practiced Mastery
Moderate platforming execution through inventive but fixed mental levels.
Air Combat leans Execution (Practiced Mastery); Psychonauts 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.
Air Combat
Stick control and missile timing carry every dogfight
Psychonauts
Platforming and psychic combat need moderate precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Air Combat
Enemy pilots fly scripted arcade patterns
Psychonauts
Mental-world enemies follow fixed behaviours
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Air Combat
Missions are fixed and fully learnable
Psychonauts
Level layouts are fixed and quickly known
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Air Combat
Plane purchases and mission knowledge smooth the campaign
Psychonauts
Collectible routing and power upgrades add light planning
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.