head to head
Fallout: New Vegas asks more than Animal Crossing: New Horizons, and the gap is execution.

Optimization · Pure Optimization
A cozy island life-sim about building a community at your pace.

Optimization · Pure Optimization
A faction-driven RPG-shooter where build and route planning shape every ending.
Animal Crossing: New Horizons leans Optimization (Pure Optimization); Fallout: New Vegas leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Animal Crossing: New Horizons
Trivial inputs.
Fallout: New Vegas
Shooter inputs with VATS assist
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Animal Crossing: New Horizons
NPCs are scripted.
Fallout: New Vegas
Scripted factions and enemies
Animal Crossing: New Horizons leans a little harder on variance, though the gap is small.
Animal Crossing: New Horizons
Daily visitors and fossils randomize.
Fallout: New Vegas
Some loot and crit RNG
Fallout: New Vegas leans clearly harder on optimization.
Animal Crossing: New Horizons
Turnips, layout, and time-routing reward planning.
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.