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

Optimization · Pure Optimization
A dungeon-crawler RPG testing party building, skill optimization and careful mapping.

Optimization · Pure Optimization
Small-town murder-mystery JRPG balancing friendships by day and TV-world dungeons by night.
Etrian Odyssey V: Beyond the Myth leans Optimization (Pure Optimization); Persona 4 leans Optimization (Pure Optimization).
Etrian Odyssey V: Beyond the Myth leans a little harder on execution, though the gap is small.
Etrian Odyssey V: Beyond the Myth
Turn-based combat needs no twitch
Persona 4
Menu combat; zero dexterity
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Etrian Odyssey V: Beyond the Myth
Enemies scripted, no adaptive opponent
Persona 4
Shadow bosses use scripted patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Etrian Odyssey V: Beyond the Myth
Random encounters and FOE patterns partly unknown
Persona 4
Randomized dungeon floors and fusion rolls
Etrian Odyssey V: Beyond the Myth leans a little harder on optimization, though the gap is small.
Etrian Odyssey V: Beyond the Myth
Class building, skill trees, and mapping drive everything
Persona 4
Social link scheduling and weakness-exploit planning
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.