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
Remake of Gaiden with dual protagonists and explorable dungeons.

Optimization · Systems & Chaos
A scripted horror adventure that tests puzzle-solving and route knowledge, not nerves alone.
Fire Emblem Echoes: Shadows of Valentia leans Optimization (Pure Optimization); Paper Lily: Chapter 1 leans Optimization (Systems & Chaos).
Paper Lily: Chapter 1 leans a little harder on execution, though the gap is small.
Fire Emblem Echoes: Shadows of Valentia
Turn-based menus only
Paper Lily: Chapter 1
Light chase sequences are the only dexterity demand
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
Paper Lily: Chapter 1
Scripted encounters with no adaptive adversary
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
Paper Lily: Chapter 1
Unknown puzzle solutions and surprises until the route is learned
Fire Emblem Echoes: Shadows of Valentia leans a little harder on optimization, though the gap is small.
Fire Emblem Echoes: Shadows of Valentia
Dual-army routing and class promotions
Paper Lily: Chapter 1
Solving puzzles and finding the correct paths is the game
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.