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
Solvable micro-tactics puzzles gated by gacha luck over unit ownership.

Optimization · Pure Optimization
A turn-based tactics game of dice-driven squad combat in cramped corridors.
Fire Emblem Heroes leans Optimization (Systems & Chaos); Space Hulk: Tactics 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
Space Hulk: Tactics
Turn-based, no dexterity needed
Space Hulk: Tactics leans a little harder on reads, though the gap is small.
Fire Emblem Heroes
Arena defense teams are AI-run, so prediction is shallow
Space Hulk: Tactics
Multiplayer involves some reading of human commanders
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
Space Hulk: Tactics
Dice rolls and card draws inject combat randomness
Space Hulk: Tactics leans a little harder on optimization, though the gap is small.
Fire Emblem Heroes
Skill inheritance, team building and tile math are deeply solvable
Space Hulk: Tactics
Positioning, action economy and card play decide battles
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.