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
An NFL management sim about roster building, scouting and game planning.
Hearts of Iron IV leans Optimization (Pure Optimization); NFL Head Coach 09 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
NFL Head Coach 09
No on-field input; pure management interface
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
NFL Head Coach 09
AI opponents scripted; light playcall prediction
NFL Head Coach 09 leans a little harder on variance, though the gap is small.
Hearts of Iron IV
focus tree branches, events
NFL Head Coach 09
Draft prospects, injuries and game sims carry hidden uncertainty
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Hearts of Iron IV
division templates and production solved
NFL Head Coach 09
Roster building, scouting and game planning are the whole 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.