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 · Pure Optimization
Optimizing pair-up chains and offspring builds to steamroll deterministically scripted maps.

Optimization · Pure Optimization
A turn-based squad tactics game about positioning marines against hidden aliens.
Fire Emblem Fates leans Optimization (Pure Optimization); Incubation: Time Is Running Out 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 Fates
Turn-based menu play; no hand-speed demands
Incubation: Time Is Running Out
Turn-based, no aiming or timing skill needed
Incubation: Time Is Running Out leans a little harder on reads, though the gap is small.
Fire Emblem Fates
AI follows scripted attack priorities, not player modeling
Incubation: Time Is Running Out
Alien AI is scripted, ambush-driven not adaptive
Fire Emblem Fates leans a little harder on variance, though the gap is small.
Fire Emblem Fates
Dual-strike/guard procs and hit rates inject meaningful RNG
Incubation: Time Is Running Out
Hidden enemies around corners create real uncertainty
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Fire Emblem Fates
Offspring seals, asset/flaw selection, and supports are deeply planned
Incubation: Time Is Running Out
Squad positioning and tactical planning win the missions
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.