head to head
Neither is simply harder - they are hard in different places. Fallout: New Vegas demands more execution; Humankind demands more variance.

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

Optimization · Pure Optimization
An optimisation puzzle about historical pathfinding against variable events.
Fallout: New Vegas leans Optimization (Pure Optimization); Humankind leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Humankind
Micro-management speed matters little; macro is king.
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
Humankind
AI opponents lack true adaptation; no human element.
Humankind leans clearly harder on variance.
Fallout: New Vegas
Some loot and crit RNG
Humankind
Era choices and event randomness create replayability.
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
Humankind
Dominating systems and cultures is a deep optimisation puzzle.
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.