head to head
Fallout: New Vegas asks more than The Settlers: Rise of an Empire, and the gap is execution.

Optimization · Pure Optimization
A faction-driven RPG-shooter where build and route planning shape every ending.

Optimization · Pure Optimization
Optimising medieval production chains and settlement layouts at a gentle pace.
Fallout: New Vegas leans Optimization (Pure Optimization); The Settlers: Rise of an Empire leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
The Settlers: Rise of an Empire
Slow-paced building needs no dexterity
The Settlers: Rise of an Empire leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
The Settlers: Rise of an Empire
Multiplayer adds mild opponent anticipation, mostly economic
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout: New Vegas
Some loot and crit RNG
The Settlers: Rise of an Empire
Map resources are scripted-but-unknown until scouted
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
The Settlers: Rise of an Empire
Settlement layout and production chains are the solvable core
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.