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 first-person puzzle game about solving surreal dream-logic challenges.

Optimization · Pure Optimization
A scripted RPG where pattern-learning and pacifist routing carry you.
Suicide Guy leans Optimization (Pure Optimization); Undertale 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.
Suicide Guy
Some platforming, but timing rarely strict
Undertale
Bullet-hell dodging in scripted patterns
Undertale leans a little harder on reads, though the gap is small.
Suicide Guy
Solo dream puzzles, no adversary
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.
Suicide Guy
Puzzle setups are fixed, nothing random
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.
Suicide Guy
Figuring out each dream's puzzle solution is the game
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.