head to head
Heroes of the Storm asks more than Call of War, and the gap is execution.

Optimization · Mind & Math
A slow WW2 grand-strategy of economy management against scheming human nations.

Reads · Mind & Math
Objective-driven MOBA with shared team XP.
Call of War leans Optimization (Mind & Math); Heroes of the Storm leans Reads (Mind & Math).
Heroes of the Storm leans clearly harder on execution.
Call of War
Issuing orders is trivial; no twitch dimension
Heroes of the Storm
Skillshots and rotations require hands
Heroes of the Storm leans a little harder on reads, though the gap is small.
Call of War
Human players form alliances and bluff in real time
Heroes of the Storm
Team-fight cooldown trading is prediction
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Call of War
Fog of war hides enemy unit positions and plans
Heroes of the Storm
Map objectives and merc camps vary
Call of War leans a little harder on optimization, though the gap is small.
Call of War
Economy, research and unit composition decide the war
Heroes of the Storm
Talent picks and team comps deep
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.