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

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

Optimization · Pure Optimization
Plannable type-matchup progression through two regions of fixed trainers.
Fallout: New Vegas leans Optimization (Pure Optimization); Pokémon SoulSilver Version leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Pokémon SoulSilver Version
Menu-driven battles have no physical component
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 SoulSilver Version
Trainer AI is scripted; human battles are an optional sideline
Pokémon SoulSilver Version leans a little harder on variance, though the gap is small.
Fallout: New Vegas
Some loot and crit RNG
Pokémon SoulSilver Version
Catch rates, crits and encounters are bounded 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 SoulSilver Version
Team building against known gyms is fully plannable
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.