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 · Pure Optimization
A wordless robot puzzle adventure where every environmental obstacle has exactly one elegant solution.

Optimization · Pure Optimization
A fixed-solution puzzle adventure where finding the right inventory combination unlocks every obstacle.
Machinarium leans Optimization (Pure Optimization); The Secret of Monkey Island leans Optimization (Pure Optimization).
Machinarium leans a little harder on execution, though the gap is small.
Machinarium
A handful of mini-games require basic timing and clicking precision
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.
Machinarium
Solo robot puzzle game with no opponent
The Secret of Monkey Island
No adaptive opponent; all puzzles are fixed and authored
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Machinarium
Arcade mini-games add minor randomness but are skipable
The Secret of Monkey Island
Some hidden items require exploration but solutions are invariant
Machinarium leans a little harder on optimization, though the gap is small.
Machinarium
Environmental logic puzzles are tightly designed closed-world problems
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.