head to head
Fallout: New Vegas asks more than Two Worlds, and the gap is optimization.

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

Optimization · Pure Optimization
Tests exploiting stackable upgrade systems in a janky open-world RPG.
Fallout: New Vegas leans Optimization (Pure Optimization); Two Worlds 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
Two Worlds
Clunky combat asks little beyond basic timing
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
Two Worlds
Enemies are simple scripted aggro
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout: New Vegas
Some loot and crit RNG
Two Worlds
Loot drops and unexplored map hold mild hidden information
Fallout: New Vegas leans clearly harder on optimization.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Two Worlds
Stackable item enchanting and builds break the game open
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.