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

Optimization · Systems & Chaos
1940s detective procedural built around crime scenes and reading scripted interrogation tells.
Downfall leans Optimization (Systems & Chaos); L.A. Noire leans Optimization (Systems & Chaos).
L.A. Noire leans a little harder on execution, though the gap is small.
Downfall
Clicking through scenes has no motor demand
L.A. Noire
Light shooting and driving, very forgiving
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
L.A. Noire
Suspects follow fixed scripts, never adapt
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Downfall
Branching horrors are hidden until choices reveal them
L.A. Noire
Interrogation tells and clues hidden until discovered
Downfall leans a little harder on optimization, though the gap is small.
Downfall
Puzzle chains and ending routes have fixed solutions
L.A. Noire
Evidence chains and question choices have fixed correct answers
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.