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.

Optimization · Systems & Chaos
A gentle hidden-object hunt through painted insect scenes with light puzzles.

Optimization · Light / Casual
A gorgeous first-person mystery about piecing together a boy's disappearance.
Morphopolis leans Optimization (Systems & Chaos); 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.
Morphopolis
Clicking painted scenes needs no dexterity
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.
Morphopolis
No opponent of any kind
The Vanishing of Ethan Carter
No opponent
Morphopolis leans a little harder on variance, though the gap is small.
Morphopolis
Hidden objects are scripted-but-unknown until spotted
The Vanishing of Ethan Carter
The mystery is hidden only until discovered
Morphopolis leans a little harder on optimization, though the gap is small.
Morphopolis
Simple puzzle chains have single fixed answers
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.