head to head
Fallout: New Vegas asks more than Xenoblade Chronicles, and the gap is execution.

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

Optimization · Pure Optimization
An open-world JRPG where build construction and art rotation planning win battles.
Fallout: New Vegas leans Optimization (Pure Optimization); Xenoblade Chronicles leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Xenoblade Chronicles
Positioning during auto-attack combat needs minimal dexterity
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
Xenoblade Chronicles
Enemy AI runs fixed aggro and art rotations
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
Xenoblade Chronicles
Drop rates and unexplored zones add mild uncertainty
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
Xenoblade Chronicles
Art rotations, gem crafting and party builds decide fights
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.