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

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

Optimization · Pure Optimization
Generous team-building optimisation against fixed Kalos trainers.
Fallout: New Vegas leans Optimization (Pure Optimization); Pokémon Y leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Pokémon Y
Turn-based menus have no physical ceiling
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout: New Vegas
Scripted factions and enemies
Pokémon Y
Campaign trainers are scripted; online play is a separate pursuit
Pokémon Y leans a little harder on variance, though the gap is small.
Fallout: New Vegas
Some loot and crit RNG
Pokémon Y
Encounters and rolls add bounded, mappable randomness
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
Pokémon Y
Mega evolutions and EV tools make optimisation the 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.