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

Optimization · Systems & Chaos
A grim point-and-click testing puzzle persistence through a fixed descent into madness.

Optimization · Pure Optimization
Methodically dissecting intricate puzzle boxes whose mechanisms are fully solvable.
Downfall leans Optimization (Systems & Chaos); The Room Three 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.
Downfall
Clicking through scenes has no motor demand
The Room Three
Rotating and prodding mechanisms takes no dexterity
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Downfall
Characters are scripted psyches, not adapting opponents
The Room Three
The Craftsman is narrative dressing, not an adaptive mind
Downfall leans a little harder on variance, though the gap is small.
Downfall
Branching horrors are hidden until choices reveal them
The Room Three
Hidden mechanisms are unknown until inspected, then fixed
The Room Three leans a little harder on optimization, though the gap is small.
Downfall
Puzzle chains and ending routes have fixed solutions
The Room Three
Each puzzle box is a fully solvable mechanical system
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.