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 · Pure Optimization
A 90s-set mystery adventure following a motorcycle-riding journalist into her hometown's secrets.

Optimization · Pure Optimization
A fixed-solution puzzle adventure where finding the right inventory combination unlocks every obstacle.
Kathy Rain leans Optimization (Pure Optimization); The Secret of Monkey Island leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Kathy Rain
No physical demands
The Secret of Monkey Island
Clicking inventory items demands no twitch skill whatsoever
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Kathy Rain
No adaptive opponent
The Secret of Monkey Island
No adaptive opponent; all puzzles are fixed and authored
Kathy Rain leans a little harder on variance, though the gap is small.
Kathy Rain
Mystery beats are hidden only until discovered
The Secret of Monkey Island
Some hidden items require exploration but solutions are invariant
The Secret of Monkey Island leans a little harder on optimization, though the gap is small.
Kathy Rain
Fixed puzzle and dialogue chain; one solution path
The Secret of Monkey Island
Correct item combinations and dialogue chains fully determine progress
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.