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

Optimization · Systems & Chaos
Medieval dynasty sim with chaotic event-driven stories.

Optimization · Systems & Chaos
Solvable micro-tactics puzzles gated by gacha luck over unit ownership.
Crusader Kings II leans Optimization (Systems & Chaos); Fire Emblem Heroes leans Optimization (Systems & Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Crusader Kings II
pausable, no reflex
Fire Emblem Heroes
Drag-and-drop tactics need no dexterity
Crusader Kings II leans a little harder on reads, though the gap is small.
Crusader Kings II
AI characters scripted not adaptive
Fire Emblem Heroes
Arena defense teams are AI-run, so prediction is shallow
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Crusader Kings II
dynastic events, traits, intrigue
Fire Emblem Heroes
Gacha summoning rolls gate which units you even own
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Crusader Kings II
succession, marriages, claims plannable
Fire Emblem Heroes
Skill inheritance, team building and tile math are deeply solvable
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.