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 · Pure Optimization
Solving an interlocking policy simulation to stay elected - nearly pure systems play.

Optimization · Pure Optimization
A vault management sim about optimising dwellers, rooms, and resource loops.
Democracy 4 leans Optimization (Pure Optimization); 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.
Democracy 4
Clicking policy sliders involves zero physical skill
Fallout Shelter
Tapping menus only
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Democracy 4
Voter blocs react by fixed simulation rules, not adaptation
Fallout Shelter
No opponent
Fallout Shelter leans a little harder on variance, though the gap is small.
Democracy 4
Random events and hidden voter thresholds inject mild uncertainty
Fallout Shelter
Incident spawns and lunchbox loot rolls
Democracy 4 leans a little harder on optimization, though the gap is small.
Democracy 4
A perfect coach solves the policy-web economy almost entirely
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.