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
Remake of Gaiden with dual protagonists and explorable dungeons.

Optimization · Pure Optimization
A detective adventure about gathering evidence and assembling deduction chains across six cases.
Fire Emblem Echoes: Shadows of Valentia leans Optimization (Pure Optimization); Sherlock Holmes: Crimes & Punishments 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
Sherlock Holmes: Crimes & Punishments
Minor minigames, no real dexterity ceiling
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
Sherlock Holmes: Crimes & Punishments
Suspects are scripted, nothing adapts to you
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Fire Emblem Echoes: Shadows of Valentia
Hit RNG plus dungeon encounters
Sherlock Holmes: Crimes & Punishments
Clues are hidden but fixed until discovered
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Fire Emblem Echoes: Shadows of Valentia
Dual-army routing and class promotions
Sherlock Holmes: Crimes & Punishments
Deduction chains have correct solvable answers
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
Fire Emblem Echoes: Shadows of Valentia →
full breakdown
Sherlock Holmes: Crimes & Punishments →