head to head
Neither is simply harder - they are hard in different places. Bravely Default II demands more variance; Fallout: New Vegas demands more execution.

Optimization · Pure Optimization
A turn-based RPG where stacking Brave points and combining job abilities into devastating chains defines mastery.

Optimization · Pure Optimization
A faction-driven RPG-shooter where build and route planning shape every ending.
Bravely Default II leans Optimization (Pure Optimization); Fallout: New Vegas leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Bravely Default II
Turn-based; no physical timing required
Fallout: New Vegas
Shooter inputs with VATS assist
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Bravely Default II
All enemies scripted; no adaptive AI
Fallout: New Vegas
Scripted factions and enemies
Bravely Default II leans clearly harder on variance.
Bravely Default II
Rare job asterisk drops and random encounter rates add light RNG
Fallout: New Vegas
Some loot and crit RNG
Bravely Default II leans a little harder on optimization, though the gap is small.
Bravely Default II
Brave/Default stacking, job synergies, and BP management form the deep solve
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.