head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, and it is a single point.

Optimization · Pure Optimization
Cyberpunk point-and-click adventure through a dystopian Australian mega-city.

Optimization · Pure Optimization
Telltale's episodic comedy adventure sending Guybrush Threepwood after a pox plaguing the Caribbean.
Beneath a Steel Sky leans Optimization (Pure Optimization); Tales 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.
Beneath a Steel Sky
Point-and-click; no dexterity required
Tales of Monkey Island
Click-driven; no physical demands.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Beneath a Steel Sky
No opponent; scripted characters
Tales of Monkey Island
LeChuck and pirates are pure script.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Beneath a Steel Sky
First-run puzzle surprises only
Tales of Monkey Island
Modern design telegraphs most puzzle information.
Beneath a Steel Sky leans a little harder on optimization, though the gap is small.
Beneath a Steel Sky
Inventory puzzle chains are fully solvable
Tales of Monkey Island
Episodic inventory puzzles each have one intended solution.
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.