head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Optimization · Pure Optimization
A faction-driven RPG-shooter where build and route planning shape every ending.

Optimization · Pure Optimization
Scheduling and routing a repeating three-day world where every event is learnable and fixed.
Fallout: New Vegas 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.
Fallout: New Vegas
Shooter inputs with VATS assist
The Legend of Zelda: Majora's Mask 3D
Combat and platforming are deliberate, rarely twitch-demanding
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
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.
Fallout: New Vegas
Some loot and crit RNG
The Legend of Zelda: Majora's Mask 3D
Schedules and secrets are unknown until discovered, then fixed
Fallout: New Vegas leans a little harder on optimization, though the gap is small.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
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.