head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Practiced Mastery
Gothic PS1 action horror of brutal melee against Victorian monsters.

Execution · Practiced Mastery
A co-op RPG-flavored Wolfenstein where twin sisters level up through occupied Paris.
Nightmare Creatures leans Execution (Practiced Mastery); Wolfenstein: Youngblood 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.
Nightmare Creatures
Combo timing and dodges against tough monsters
Wolfenstein: Youngblood
Gunplay still matters but levels gate by stats
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Nightmare Creatures
Creatures use fixed attack patterns
Wolfenstein: Youngblood
Co-op versus scripted enemies, no adaptation
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Nightmare Creatures
Ambush placement unknown first time through
Wolfenstein: Youngblood
Mission boards and loot add mild randomness
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Nightmare Creatures
Adrenaline meter management and route learning
Wolfenstein: Youngblood
RPG levels, weapon mods, and enemy armor types dominate
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.