head to head
Path of Exile asks more than Fallout: New Vegas, and the gap is variance.

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

Optimization · Pure Optimization
A theorycraft-dense ARPG about engineering builds through randomised loot and crafting.
Fallout: New Vegas leans Optimization (Pure Optimization); Path of Exile leans Optimization (Pure Optimization).
Fallout: New Vegas leans a little harder on execution, though the gap is small.
Fallout: New Vegas
Shooter inputs with VATS assist
Path of Exile
Some dodge and reflex play, but build carries fights.
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
Path of Exile
Mobs and bosses are scripted; no adaptation.
Path of Exile leans clearly harder on variance.
Fallout: New Vegas
Some loot and crit RNG
Path of Exile
Loot, map mods, and crafting outcomes are heavily random.
Path of Exile leans clearly harder on optimization.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Path of Exile
Passive tree, crafting, and economy form near-infinite theorycraft.
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.