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
Gunpowder-era Total War blending empire management with line battles.

Optimization · Pure Optimization
A timer-and-spreadsheet 4X where officer math and resource pipelines decide everything.
Empire: Total War leans Optimization (Pure Optimization); Star Trek Fleet Command leans Optimization (Pure Optimization).
Empire: Total War leans a little harder on execution, though the gap is small.
Empire: Total War
Real-time battle micro is modest
Star Trek Fleet Command
Menu taps and timers - no hands required
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Empire: Total War
Multiplayer line-battle feints exist
Star Trek Fleet Command
Rival alliances raid and retaliate, mildly worth predicting
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Empire: Total War
Campaign AI and battle dice noise
Star Trek Fleet Command
Loot rolls and unscouted systems add hidden information
Empire: Total War leans a little harder on optimization, though the gap is small.
Empire: Total War
Campaign economy and line-infantry tactics are mappable
Star Trek Fleet Command
Officer synergies, ship tiers and resource pipelines are the real 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.