head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

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

Optimization · Pure Optimization
A turn-based tactics game with Mario and Rabbid characters.
Empire: Total War leans Optimization (Pure Optimization); Mario + Rabbids Sparks of Hope 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.
Empire: Total War
Real-time battle micro is modest
Mario + Rabbids Sparks of Hope
Menu-driven actions, light aim
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
Mario + Rabbids Sparks of Hope
Some AI positioning to anticipate
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
Mario + Rabbids Sparks of Hope
Hit chances and spark draws
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Empire: Total War
Campaign economy and line-infantry tactics are mappable
Mario + Rabbids Sparks of Hope
Team comp, spark synergy, positioning
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.