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
WWII grand strategy: templates, production, and focus paths.

Optimization · Pure Optimization
A 4X strategy game testing empire economy, tech, and military planning.
Hearts of Iron IV leans Optimization (Pure Optimization); Oriental Empires leans Optimization (Pure Optimization).
Hearts of Iron IV leans a little harder on execution, though the gap is small.
Hearts of Iron IV
pausable, micromanagement-heavy
Oriental Empires
Turn-based commands need no twitch precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Hearts of Iron IV
PvP partly, mostly scripted AI
Oriental Empires
Multiplayer rewards anticipating rivals, but AI is scripted
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Hearts of Iron IV
focus tree branches, events
Oriental Empires
Combat and event randomness, mostly bounded
Hearts of Iron IV leans a little harder on optimization, though the gap is small.
Hearts of Iron IV
division templates and production solved
Oriental Empires
Economy, tech, and army development decide empires
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.