head to head
Fallout: New Vegas asks more than Operencia: The Stolen Sun, 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 turn-based dungeon crawler testing party building and methodical dungeon mapping.
Fallout: New Vegas leans Optimization (Pure Optimization); Operencia: The Stolen Sun leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Operencia: The Stolen Sun
Turn-based combat removes any physical ceiling
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
Operencia: The Stolen Sun
Encounters are scripted, no adaptive mind
Operencia: The Stolen Sun leans a little harder on variance, though the gap is small.
Fallout: New Vegas
Some loot and crit RNG
Operencia: The Stolen Sun
Dungeon secrets and loot are hidden until mapped
Fallout: New Vegas leans a little harder on optimization, though the gap is small.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Operencia: The Stolen Sun
Party builds and turn sequencing are the solvable core
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.