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.

Execution · Practiced Mastery
The series' action peak, with flashy drive forms and superbosses that built a lasting challenge-run community.

Execution · Practiced Mastery
A character action RPG built on tight parry timing against elaborate scripted bosses.
Kingdom Hearts II leans Execution (Practiced Mastery); Stellar Blade leans Execution (Practiced Mastery).
Stellar Blade leans a little harder on execution, though the gap is small.
Kingdom Hearts II
Revenge values and Data fights demand precise play
Stellar Blade
Parry and perfect-dodge timing windows define the ceiling
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Kingdom Hearts II
Even superbosses run scripted, mappable patterns
Stellar Blade
Bosses run fixed movesets, learnable not adaptive
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Kingdom Hearts II
Fully visible action systems
Stellar Blade
Encounters and loot are static and predictable
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Kingdom Hearts II
Forms, abilities, and boss study reward labbing
Stellar Blade
Exospine builds, gear and moveset study reward preparation
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.