head to head
Neither is simply harder - they are hard in different places. Persona 5 Royal demands more optimization; The Elder Scrolls V: Skyrim demands more execution.

Optimization · Pure Optimization
A calendar JRPG about routing social links and engineering persona fusion chains.

Optimization · Pure Optimization
An open-world RPG mostly about discovering and stacking exploitable progression systems.
Persona 5 Royal leans Optimization (Pure Optimization); The Elder Scrolls V: Skyrim leans Optimization (Pure Optimization).
The Elder Scrolls V: Skyrim leans clearly harder on execution.
Persona 5 Royal
Menu-driven combat; no mechanical skill demanded.
The Elder Scrolls V: Skyrim
Combat is forgiving; aim and timing rarely punish you.
Persona 5 Royal leans a little harder on reads, though the gap is small.
Persona 5 Royal
Enemies use scripted weakness AI; not adaptive.
The Elder Scrolls V: Skyrim
Enemy AI is scripted and exploitable; not adaptive.
Persona 5 Royal leans a little harder on variance, though the gap is small.
Persona 5 Royal
Shuffle time, fusion accidents, and crit rolls.
The Elder Scrolls V: Skyrim
Loot tables and leveled lists inject mild randomness.
Persona 5 Royal leans clearly harder on optimization.
Persona 5 Royal
Calendar routing, fusion, and confidant order are deeply solvable.
The Elder Scrolls V: Skyrim
Skill stacking, enchant loops, and exploits 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.