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 · Systems & Chaos
A narrative mystery testing deduction by matching evidence against scripted lies.

Optimization · Pure Optimization
A vault management sim about optimising dwellers, rooms, and resource loops.
A Case of Distrust leans Optimization (Systems & Chaos); Fallout Shelter 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.
A Case of Distrust
Pure dialogue and menu selection
Fallout Shelter
Tapping menus only
A Case of Distrust leans a little harder on reads, though the gap is small.
A Case of Distrust
Suspects lie by script, not in response to you
Fallout Shelter
No opponent
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
A Case of Distrust
The mystery is hidden information until evidence reveals it
Fallout Shelter
Incident spawns and lunchbox loot rolls
Fallout Shelter leans a little harder on optimization, though the gap is small.
A Case of Distrust
Matching statements against evidence is a deduction puzzle
Fallout Shelter
Dweller stats and room layout are fully solvable
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.