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

Optimization · Pure Optimization
A detective adventure about gathering clues to solve an authored murder case.

Optimization · Systems & Chaos
An interactive crime drama where timed family choices branch a scripted crisis toward multiple endings.
Agatha Christie: Hercule Poirot - The London Case leans Optimization (Pure Optimization); As Dusk Falls leans Optimization (Systems & Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Agatha Christie: Hercule Poirot - The London Case
Point-and-click interaction needs no physical skill
As Dusk Falls
Timed vote prompts create mild urgency but no skill ceiling
Agatha Christie: Hercule Poirot - The London Case leans a little harder on reads, though the gap is small.
Agatha Christie: Hercule Poirot - The London Case
Suspects are scripted, not adapting to your deductions
As Dusk Falls
Character arcs are scripted; no opponent adapts to your choices
As Dusk Falls leans a little harder on variance, though the gap is small.
Agatha Christie: Hercule Poirot - The London Case
Clues hidden until found, but fully authored
As Dusk Falls
Branching outcomes obscure which paths are accessible from current state
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Agatha Christie: Hercule Poirot - The London Case
Connecting evidence to solve the fixed case is the work
As Dusk Falls
Understanding the branching tree allows deliberate replays toward target endings
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.