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.

Optimization · Systems & Chaos
A horror visual novel testing careful choice-mapping to avoid hidden bad endings.

Variance · Light / Casual
A narrative horror experience testing curiosity more than any skill axis.
Corpse Party: Book of Shadows leans Optimization (Systems & Chaos); MiSide leans Variance (Light / Casual).
MiSide leans a little harder on execution, though the gap is small.
Corpse Party: Book of Shadows
Visual-novel navigation needs only reading
MiSide
Walking and minigames make light physical demands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Corpse Party: Book of Shadows
No adaptive opponent in the cursed school
MiSide
Mita is a scripted character, not an adaptive mind
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Corpse Party: Book of Shadows
Wrong-end triggers are hidden until discovered
MiSide
Story surprises are hidden only until experienced
Corpse Party: Book of Shadows leans a little harder on optimization, though the gap is small.
Corpse Party: Book of Shadows
Mapping flags and choices to endings is the only system
MiSide
Linear narrative with simple puzzles to step through
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.