head to head
Fallout: New Vegas asks more than Seasons after Fall, and the gap is optimization.

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

Optimization · Pure Optimization
A calm test of figuring out season-switching environmental puzzles.
Fallout: New Vegas leans Optimization (Pure Optimization); Seasons after Fall leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Seasons after Fall
Relaxed platforming with no fail-pressure
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
Seasons after Fall
No enemies or opponents at all
Fallout: New Vegas leans a little harder on variance, though the gap is small.
Fallout: New Vegas
Some loot and crit RNG
Seasons after Fall
World is fixed, nothing random
Fallout: New Vegas leans clearly harder on optimization.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Seasons after Fall
Season-switching puzzles have single intended solutions
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.