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

Optimization · Systems & Chaos
Solvable micro-tactics puzzles gated by gacha luck over unit ownership.

Optimization · Pure Optimization
A meta deckbuilder where engine-building beats the scripted opponent.
Fire Emblem Heroes leans Optimization (Systems & Chaos); Inscryption 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 Heroes
Drag-and-drop tactics need no dexterity
Inscryption
No reflex demands; turn-based card play.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Fire Emblem Heroes
Arena defense teams are AI-run, so prediction is shallow
Inscryption
Scripted opponents with light bluff moments, not true adaptation.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Fire Emblem Heroes
Gacha summoning rolls gate which units you even own
Inscryption
Card draws and event choices randomized.
Inscryption leans a little harder on optimization, though the gap is small.
Fire Emblem Heroes
Skill inheritance, team building and tile math are deeply solvable
Inscryption
Deck construction and sacrifice math drive victories.
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.