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
Tactical action-point puzzles threaded through a branching hidden-truth narrative.
Fire Emblem Echoes: Shadows of Valentia leans Optimization (Pure Optimization); The Hundred Line: Last Defense Academy 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
The Hundred Line: Last Defense Academy
Turn-based tactics and reading require no dexterity
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
The Hundred Line: Last Defense Academy
Monsters and classmates follow authored scripts
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
The Hundred Line: Last Defense Academy
Route branches and story twists are hidden information to uncover
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
The Hundred Line: Last Defense Academy
Action-point puzzles and route planning are the solvable spine
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
The Hundred Line: Last Defense Academy →