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

Optimization · Practiced Mastery
Lovecraftian first-person horror where survival means learning Innsmouth's scripted terrors.

Optimization · Practiced Mastery
Psychological horror classic whose sanity effects mess with the player, not the meta.
Call of Cthulhu: Dark Corners of the Earth leans Optimization (Practiced Mastery); Eternal Darkness: Sanity's Requiem leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Cthulhu: Dark Corners of the Earth
Tense chase and shooting sequences need steady hands
Eternal Darkness: Sanity's Requiem
Targeted dismemberment combat, modest demands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Cthulhu: Dark Corners of the Earth
Cultists follow scripts, never adapt
Eternal Darkness: Sanity's Requiem
Sanity tricks are scripted, not adaptive
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Cthulhu: Dark Corners of the Earth
First-run dread from unknown scripted events
Eternal Darkness: Sanity's Requiem
Unknown sanity effects shock first-time players
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Call of Cthulhu: Dark Corners of the Earth
Learning routes, hiding spots, and sequences solves it
Eternal Darkness: Sanity's Requiem
Spell combinations and learned encounter layouts
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.
full breakdown
Call of Cthulhu: Dark Corners of the Earth →
full breakdown
Eternal Darkness: Sanity's Requiem →