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

Optimization · Pure Optimization
Remake of Gaiden with dual protagonists and explorable dungeons.

Optimization · Pure Optimization
Stylish JRPG where phantom thieves steal hearts on a tightly optimized school calendar.
Fire Emblem Echoes: Shadows of Valentia leans Optimization (Pure Optimization); Persona 5 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.
Fire Emblem Echoes: Shadows of Valentia
Turn-based menus only
Persona 5
Stylish menus, not reflexes
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Fire Emblem Echoes: Shadows of Valentia
Scripted enemies on both routes
Persona 5
Palace enemies use fixed weaknesses
Fire Emblem Echoes: Shadows of Valentia leans a little harder on variance, though the gap is small.
Fire Emblem Echoes: Shadows of Valentia
Hit RNG plus dungeon encounters
Persona 5
Fusion alerts and negotiation rolls
Persona 5 leans a little harder on optimization, though the gap is small.
Fire Emblem Echoes: Shadows of Valentia
Dual-army routing and class promotions
Persona 5
Confidant calendar routing and baton-pass weakness chains
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.