head to head
Hearts of Iron IV asks more than Dragon Quest Wars, and the gap is optimization.

Optimization · Mind & Math
A turn-based tactics game testing positioning and team optimization against human or AI opponents.

Optimization · Pure Optimization
WWII grand strategy: templates, production, and focus paths.
Dragon Quest Wars leans Optimization (Mind & Math); Hearts of Iron IV leans Optimization (Pure Optimization).
Hearts of Iron IV leans a little harder on execution, though the gap is small.
Dragon Quest Wars
Turn-based piece moves require no twitch input
Hearts of Iron IV
pausable, micromanagement-heavy
Dragon Quest Wars leans a little harder on reads, though the gap is small.
Dragon Quest Wars
Human opponents adapt positioning in versus matches
Hearts of Iron IV
PvP partly, mostly scripted AI
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Quest Wars
Monster abilities and dice-like spell outcomes add chance
Hearts of Iron IV
focus tree branches, events
Hearts of Iron IV leans clearly harder on optimization.
Dragon Quest Wars
Positioning, team selection and turn order are solvable
Hearts of Iron IV
division templates and production solved
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.