head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

Optimization · Pure Optimization
The original post-apocalyptic CRPG where character builds solve the wasteland.

Optimization · Pure Optimization
A calendar-driven JRPG carried by persona fusion and social-link planning.
Fallout leans Optimization (Pure Optimization); Persona 4 Golden leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout
Turn-based, no dexterity
Persona 4 Golden
Turn-based, no input demand
Persona 4 Golden leans a little harder on reads, though the gap is small.
Fallout
No adaptive opposition
Persona 4 Golden
Scripted enemies
Fallout leans a little harder on variance, though the gap is small.
Fallout
To-hit rolls and random encounters
Persona 4 Golden
Weakness and crit rolls
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Fallout
SPECIAL builds and quest routing are deeply solvable
Persona 4 Golden
Persona fusion and calendar routing 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.