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
A precise action RPG about learning fixed boss patterns through punishing repetition.

Execution · Practiced Mastery
The series' action peak, with flashy drive forms and superbosses that built a lasting challenge-run community.
Dark Souls leans Execution (Practiced Mastery); Kingdom Hearts II leans Execution (Practiced Mastery).
Dark Souls leans a little harder on execution, though the gap is small.
Dark Souls
Timing dodges and stamina control define every encounter.
Kingdom Hearts II
Revenge values and Data fights demand precise play
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dark Souls
Bosses run fixed scripted movesets; not adaptive.
Kingdom Hearts II
Even superbosses run scripted, mappable patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dark Souls
Minor drop-rate randomness; otherwise deterministic world.
Kingdom Hearts II
Fully visible action systems
Dark Souls leans a little harder on optimization, though the gap is small.
Dark Souls
Builds, routes, and boss patterns are fully learnable.
Kingdom Hearts II
Forms, abilities, and boss study reward labbing
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.