head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Pure Optimization
Mapping dungeons and engineering party builds against chartable threats.

Optimization · Pure Optimization
Gentler GBA Fire Emblem with branching promotions and an optional grinding tower softening the tactics test.
Etrian Odyssey Untold: The Millennium Girl leans Optimization (Pure Optimization); Fire Emblem: The Sacred Stones 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.
Etrian Odyssey Untold: The Millennium Girl
Turn-based menus require no dexterity
Fire Emblem: The Sacred Stones
Grid menu tactics; nothing physical.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Etrian Odyssey Untold: The Millennium Girl
FOE patterns are scripted and chartable
Fire Emblem: The Sacred Stones
Enemies use fixed targeting logic.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Etrian Odyssey Untold: The Millennium Girl
Unknown floors and ambushes punish until mapped
Fire Emblem: The Sacred Stones
Hit, crit, and growth RNG remain meaningful.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Etrian Odyssey Untold: The Millennium Girl
Party builds, skill synergies and map routing dominate
Fire Emblem: The Sacred Stones
Branching promotions and grindable maps reward build 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.
full breakdown
Etrian Odyssey Untold: The Millennium Girl →
full breakdown
Fire Emblem: The Sacred Stones →