head to head
Fallout: New Vegas asks more than Last Day on Earth: Survival, and the gap is execution.

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

Optimization · Pure Optimization
A crafting-grind survival loop where efficient resource routing beats any combat skill.
Fallout: New Vegas leans Optimization (Pure Optimization); Last Day on Earth: Survival leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Last Day on Earth: Survival
Tap-to-fight combat with minimal twitch demand
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout: New Vegas
Scripted factions and enemies
Last Day on Earth: Survival
Other players raid bases but rarely interact live
Last Day on Earth: Survival leans a little harder on variance, though the gap is small.
Fallout: New Vegas
Some loot and crit RNG
Last Day on Earth: Survival
Loot tables and event spawns add mappable randomness
Fallout: New Vegas leans a little harder on optimization, though the gap is small.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Last Day on Earth: Survival
Crafting trees, base layout and energy routing dominate progress
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.