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.

Optimization · Practiced Mastery
Motion-controlled Zelda where every swing's direction matters against blocking foes.

Optimization · Pure Optimization
A scripted RPG where pattern-learning and pacifist routing carry you.
The Legend of Zelda: Skyward Sword leans Optimization (Practiced Mastery); Undertale leans Optimization (Pure Optimization).
The Legend of Zelda: Skyward Sword leans a little harder on execution, though the gap is small.
The Legend of Zelda: Skyward Sword
Directional motion swordplay demands deliberate angled swings
Undertale
Bullet-hell dodging in scripted patterns
Undertale leans a little harder on reads, though the gap is small.
The Legend of Zelda: Skyward Sword
Enemies telegraph fixed blocking stances
Undertale
NPCs follow fixed dialogue trees, not adaptive
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
The Legend of Zelda: Skyward Sword
Linear and authored
Undertale
Minimal randomness in encounters
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
The Legend of Zelda: Skyward Sword
Dense dungeon puzzles and item logic
Undertale
Learning fixed boss patterns and mercy routes wins
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.