head to head
Fallout: New Vegas asks more than Pokemon Black Version 2, and the gap is execution.

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

Optimization · Pure Optimization
The direct Unova sequel with an expanded Pokedex, Pokemon World Tournament, and the toughest Gen 5 content.
Fallout: New Vegas leans Optimization (Pure Optimization); Pokemon Black Version 2 leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Pokemon Black Version 2
Turn-based; nothing for the hands
Pokemon Black Version 2 leans a little harder on reads, though the gap is small.
Fallout: New Vegas
Scripted factions and enemies
Pokemon Black Version 2
Campaign foes are scripted; competitive PvP optional
Pokemon Black Version 2 leans a little harder on variance, though the gap is small.
Fallout: New Vegas
Some loot and crit RNG
Pokemon Black Version 2
Encounter and catch RNG plus hidden IVs
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
Pokemon Black Version 2
Deep team building, EV training, and matchup mastery
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.