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.

Execution · Practiced Mastery
A precision metroidvania about learning fixed boss patterns and tight platforming.

Execution · Practiced Mastery
Punishing platforming execution over learnable boss orders and part builds.
Hollow Knight leans Execution (Practiced Mastery); Mega Man X6 leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Hollow Knight
Precise platforming and pogo timing dominate hard content.
Mega Man X6
Cruel platforming and boss windows demand frame-tight inputs
Hollow Knight leans a little harder on reads, though the gap is small.
Hollow Knight
Bosses run scripted attack pools; not adaptive.
Mega Man X6
Bosses are fixed pattern sets
Mega Man X6 leans a little harder on variance, though the gap is small.
Hollow Knight
Negligible; world layout is fixed.
Mega Man X6
The Nightmare System shuffles level hazards between runs
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Hollow Knight
Charm builds and boss routes are fully learnable.
Mega Man X6
Weapon orders, armor parts and route knowledge are essential
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.