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 · Pure Optimization
Charming diorama puzzler about routing a jumpless Toad to each star.

Optimization · Pure Optimization
A speedy GBA metroidvania that doubles its castle into two mirrored layouts to untangle.
Captain Toad: Treasure Tracker leans Optimization (Pure Optimization); Castlevania: Harmony of Dissonance leans Optimization (Pure Optimization).
Castlevania: Harmony of Dissonance leans a little harder on execution, though the gap is small.
Captain Toad: Treasure Tracker
Gentle navigation, no jumping, light timing
Castlevania: Harmony of Dissonance
Fast dashes make combat forgiving.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Captain Toad: Treasure Tracker
No adaptive opposition anywhere
Castlevania: Harmony of Dissonance
Scripted enemies and bosses.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Captain Toad: Treasure Tracker
Everything is visible and fixed
Castlevania: Harmony of Dissonance
Minor relic and drop luck.
Captain Toad: Treasure Tracker leans a little harder on optimization, though the gap is small.
Captain Toad: Treasure Tracker
Rotating dioramas to solve fixed route puzzles
Castlevania: Harmony of Dissonance
Twin-castle navigation and spellbook combos carry it.
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.