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 branching fairytale that tests curiosity about choices more than any skill.

Variance · Light / Casual
A short, unsettling visual novel about intrusive thoughts with no skill test.
Cinders leans Variance (Light / Casual); Milk Inside a Bag of Milk Inside a Bag of Milk leans Variance (Light / Casual).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Cinders
Reading and choosing requires no dexterity
Milk Inside a Bag of Milk Inside a Bag of Milk
no physical skill demand at all
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Cinders
Characters are scripted branches, not adaptive minds
Milk Inside a Bag of Milk Inside a Bag of Milk
no opponent of any kind
Cinders leans a little harder on variance, though the gap is small.
Cinders
Branch outcomes are hidden on a first playthrough
Milk Inside a Bag of Milk Inside a Bag of Milk
branching text has minor unpredictability
Cinders leans a little harder on optimization, though the gap is small.
Cinders
Mapping choice flags to endings is a light puzzle
Milk Inside a Bag of Milk Inside a Bag of Milk
barely any systems to solve
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.