head to head
Fallout: New Vegas asks more than Democracy 4, and the gap is execution.

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

Optimization · Pure Optimization
A faction-driven RPG-shooter where build and route planning shape every ending.
Democracy 4 leans Optimization (Pure Optimization); Fallout: New Vegas leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Democracy 4
Clicking policy sliders involves zero physical skill
Fallout: New Vegas
Shooter inputs with VATS assist
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Democracy 4
Voter blocs react by fixed simulation rules, not adaptation
Fallout: New Vegas
Scripted factions and enemies
Democracy 4 leans a little harder on variance, though the gap is small.
Democracy 4
Random events and hidden voter thresholds inject mild uncertainty
Fallout: New Vegas
Some loot and crit RNG
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Democracy 4
A perfect coach solves the policy-web economy almost entirely
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
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.