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

Optimization · Pure Optimization
God game blending city building, creature training and conquering by awe or force.

Optimization · Pure Optimization
A faction-driven RPG-shooter where build and route planning shape every ending.
Black & White 2 leans Optimization (Pure Optimization); Fallout: New Vegas leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Black & White 2
Gesture casting and creature handling need mild dexterity.
Fallout: New Vegas
Shooter inputs with VATS assist
Fallout: New Vegas leans a little harder on reads, though the gap is small.
Black & White 2
Creature learning is trainable, not adversarially adaptive.
Fallout: New Vegas
Scripted factions and enemies
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Black & White 2
Creature behaviour quirks add some unpredictability.
Fallout: New Vegas
Some loot and crit RNG
Fallout: New Vegas leans a little harder on optimization, though the gap is small.
Black & White 2
City impressiveness versus army economy is the solvable choice.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
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.