head to head
Fallout: New Vegas asks more than Persona 5 Royal, and the gap is execution.

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

Optimization · Pure Optimization
A calendar JRPG about routing social links and engineering persona fusion chains.
Fallout: New Vegas leans Optimization (Pure Optimization); Persona 5 Royal leans Optimization (Pure Optimization).
Fallout: New Vegas leans clearly harder on execution.
Fallout: New Vegas
Shooter inputs with VATS assist
Persona 5 Royal
Menu-driven combat; no mechanical skill demanded.
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
Persona 5 Royal
Enemies use scripted weakness AI; not adaptive.
Persona 5 Royal leans a little harder on variance, though the gap is small.
Fallout: New Vegas
Some loot and crit RNG
Persona 5 Royal
Shuffle time, fusion accidents, and crit rolls.
Persona 5 Royal leans a little harder on optimization, though the gap is small.
Fallout: New Vegas
Faction routing, perks, builds heavily rewarded
Persona 5 Royal
Calendar routing, fusion, and confidant order are deeply solvable.
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.