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

Optimization · Pure Optimization
A turn-based WWII dogfighting game about positioning planes and planning maneuvers.
Empire: Total War leans Optimization (Pure Optimization); Sid Meier's Ace Patrol: Pacific Skies 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
Sid Meier's Ace Patrol: Pacific Skies
Turn-based moves, no twitch input
Sid Meier's Ace Patrol: Pacific Skies leans a little harder on reads, though the gap is small.
Empire: Total War
Multiplayer line-battle feints exist
Sid Meier's Ace Patrol: Pacific Skies
Hot-seat multiplayer lets you predict human opponents
Sid Meier's Ace Patrol: Pacific Skies leans a little harder on variance, though the gap is small.
Empire: Total War
Campaign AI and battle dice noise
Sid Meier's Ace Patrol: Pacific Skies
Combat dice and positioning add chance
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
Sid Meier's Ace Patrol: Pacific Skies
Maneuver planning and upgrade choices solve each mission
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.