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
The sequel expands the mechanical puzzle boxes into full eerie rooms spanning crypts, ships, and seances.
Machinarium leans Optimization (Pure Optimization); The Room Two 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 Room Two
Slow tactile fiddling, zero dexterity bar
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 Room Two
No opponent exists
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 Room Two
Unknown contraptions until explored, then fixed
Machinarium leans a little harder on optimization, though the gap is small.
Machinarium
Environmental logic puzzles are tightly designed closed-world problems
The Room Two
Fixed mechanical puzzles with single deducible solutions
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.