head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

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

Optimization · Pure Optimization
A philosophical JRPG where mech fuel economy, deathblow routing, and ether optimization underpin its scripted encounters.
Fallout: New Vegas leans Optimization (Pure Optimization); Xenogears 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
Xenogears
Gear AP combos and deathblow inputs require some sequence awareness
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
Xenogears
All enemies scripted; no adaptive AI
Xenogears leans a little harder on variance, though the gap is small.
Fallout: New Vegas
Some loot and crit RNG
Xenogears
Random encounter rate and minor gear fuel variance present
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Xenogears
Deathblow combos, Gear fuel economy, and ether investment are solvable systems
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.