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

Optimization · Pure Optimization
Survival horror testing inventory routing and ammo economy through a fixed mansion of scripts.

Optimization · Pure Optimization
Scheduling and routing a repeating three-day world where every event is learnable and fixed.
Resident Evil Code: Veronica X leans Optimization (Pure Optimization); The Legend of Zelda: Majora's Mask 3D leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Resident Evil Code: Veronica X
Tank controls and aimed shots under pressure need composure
The Legend of Zelda: Majora's Mask 3D
Combat and platforming are deliberate, rarely twitch-demanding
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Resident Evil Code: Veronica X
Zombies and bosses follow fixed scripted behaviour
The Legend of Zelda: Majora's Mask 3D
NPCs run fixed three-day schedules, nothing adapts
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Resident Evil Code: Veronica X
Item placements are scripted-but-unknown on first runs
The Legend of Zelda: Majora's Mask 3D
Schedules and secrets are unknown until discovered, then fixed
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Resident Evil Code: Veronica X
Ammo economy, item routing and key puzzles drive everything
The Legend of Zelda: Majora's Mask 3D
Planning the time loop around NPC schedules is the game
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.