head to head
Total War: Warhammer II asks more than Fallout: New Vegas, and the gap is reads.

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

Optimization · Pure Optimization
Optimizing race mechanics and vortex rituals while executing real-time battle tactics.
Fallout: New Vegas leans Optimization (Pure Optimization); Total War: Warhammer II leans Optimization (Pure Optimization).
Total War: Warhammer II leans a little harder on execution, though the gap is small.
Fallout: New Vegas
Shooter inputs with VATS assist
Total War: Warhammer II
Unit micro, spell timing, and formation play drive battle outcomes
Total War: Warhammer II leans clearly harder on reads.
Fallout: New Vegas
Scripted factions and enemies
Total War: Warhammer II
Vortex campaign AI predictable; human opponents require genuine reads
Total War: Warhammer II leans clearly harder on variance.
Fallout: New Vegas
Some loot and crit RNG
Total War: Warhammer II
Rite costs, random loot drops, and chaos invasion timing create variance
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
Total War: Warhammer II
Race mechanics and vortex ritual routing are richly optimizable
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.