head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Pure Optimization
Bleak Ellison adaptation where five tortured souls face a sadistic AI.

Optimization · Pure Optimization
Comedic point-and-click adventure of Guybrush Threepwood, hand-drawn at its peak.
I Have No Mouth, and I Must Scream leans Optimization (Pure Optimization); The Curse 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.
I Have No Mouth, and I Must Scream
Pure point-and-click, no dexterity
The Curse of Monkey Island
pointing and clicking only
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
I Have No Mouth, and I Must Scream
AM is scripted despite the menace
The Curse of Monkey Island
no adaptive opponent
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
I Have No Mouth, and I Must Scream
Obscure solutions hidden until discovered
The Curse of Monkey Island
puzzle solutions unknown on first play, then fixed
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
I Have No Mouth, and I Must Scream
Puzzle chains and ethical-path knowledge
The Curse of Monkey Island
inventory logic puzzles are fully solvable
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.