Building comparison
head to head
Song of the DeepvsUndertale
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.
Song of the Deep
Optimization · Practiced Mastery
A storybook underwater metroidvania about a girl piloting a homemade submarine to find her father.
Undertale
Optimization · Pure Optimization
A scripted RPG where pattern-learning and pacifist routing carry you.
Song of the Deep leans Optimization (Practiced Mastery); Undertale leans Optimization (Pure Optimization).
Song of the DeepUndertale
Axis by axis
Execution4 vs 4
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Song of the Deep
Gentle submarine handling and claw manipulation
Undertale
Bullet-hell dodging in scripted patterns
Reads1 vs 1
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Song of the Deep
Scripted sea creatures
Undertale
NPCs follow fixed dialogue trees, not adaptive
Variance2 vs 1
Song of the Deep leans a little harder on variance, though the gap is small.
Song of the Deep
Unknown undersea map first dive
Undertale
Minimal randomness in encounters
Optimization6 vs 7
Undertale leans a little harder on optimization, though the gap is small.
Song of the Deep
Environmental puzzles and upgrade routing carry 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.