head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is variance, and it is a single point.

Variance · Light / Casual
A narrative horror experience testing curiosity more than any skill axis.

Optimization · Light / Casual
A gorgeous first-person mystery about piecing together a boy's disappearance.
MiSide leans Variance (Light / Casual); The Vanishing of Ethan Carter leans Optimization (Light / Casual).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
MiSide
Walking and minigames make light physical demands
The Vanishing of Ethan Carter
Walking and looking, nothing more
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
MiSide
Mita is a scripted character, not an adaptive mind
The Vanishing of Ethan Carter
No opponent
MiSide leans a little harder on variance, though the gap is small.
MiSide
Story surprises are hidden only until experienced
The Vanishing of Ethan Carter
The mystery is hidden only until discovered
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
MiSide
Linear narrative with simple puzzles to step through
The Vanishing of Ethan Carter
Reconstructing event sequences is light deduction
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.