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
Calm path-routing logic puzzles that are pure constraint satisfaction.

Optimization · Pure Optimization
A puzzle-forward adventure testing creative lateral thinking against a fixed authored solution space.
Lyne leans Optimization (Pure Optimization); Return to Monkey Island leans Optimization (Pure Optimization).
Return to Monkey Island leans a little harder on execution, though the gap is small.
Lyne
Tracing paths has no time pressure
Return to Monkey Island
Modern hint system and relaxed interface remove all reflex demands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Lyne
Pure solo logic - no opponent
Return to Monkey Island
Entirely authored puzzles with no adaptive opponent
Return to Monkey Island leans a little harder on variance, though the gap is small.
Lyne
Every board is fully visible and deterministic
Return to Monkey Island
Virtually no randomness; solutions are static
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Lyne
Each board is a solvable path-routing constraint puzzle
Return to Monkey Island
Lateral-thinking item puzzles require mapping cause and effect chains
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.