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
Moderate platforming execution through inventive but fixed mental levels.

Execution · Practiced Mastery
A cinematic desert-bound adventure of shootouts, brawls, and sinking-ship set pieces.
Psychonauts leans Execution (Practiced Mastery); Uncharted 3: Drake's Deception leans Execution (Practiced Mastery).
Psychonauts leans a little harder on execution, though the gap is small.
Psychonauts
Platforming and psychic combat need moderate precision
Uncharted 3: Drake's Deception
Gunfights, melee, and chases need steady hands
Uncharted 3: Drake's Deception leans a little harder on reads, though the gap is small.
Psychonauts
Mental-world enemies follow fixed behaviours
Uncharted 3: Drake's Deception
Scripted enemies; multiplayer adds a trace
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
Uncharted 3: Drake's Deception
Linear authored adventure
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
Uncharted 3: Drake's Deception
Learning encounters and routes solves the campaign
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.