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
Moderate platforming execution through inventive but fixed mental levels.

Execution · Practiced Mastery
Retro run-and-gun reflexes over memorised level layouts and item routes.
Psychonauts leans Execution (Practiced Mastery); Rambo III 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.
Psychonauts
Platforming and psychic combat need moderate precision
Rambo III
Shooting and dodging through enemy soldiers leads the test
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Psychonauts
Mental-world enemies follow fixed behaviours
Rambo III
Guards follow simple fixed routines
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Psychonauts
Level layouts are fixed and quickly known
Rambo III
Level layouts are static once seen
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Psychonauts
Collectible routing and power upgrades add light planning
Rambo III
Learning item locations and routes solves each mission
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.