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 · Mind & Math
Economy and formation optimisation at huge scale against adapting human strategy.

Reads · Mind & Math
Objective-driven MOBA with shared team XP.
Cossacks: European Wars leans Optimization (Mind & Math); Heroes of the Storm leans Reads (Mind & Math).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Cossacks: European Wars
Managing thousands of units strains APM and attention
Heroes of the Storm
Skillshots and rotations require hands
Heroes of the Storm leans a little harder on reads, though the gap is small.
Cossacks: European Wars
Human opponents shift compositions and timing attacks
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.
Cossacks: European Wars
Map resources and scouting gaps hide information early
Heroes of the Storm
Map objectives and merc camps vary
Cossacks: European Wars leans a little harder on optimization, though the gap is small.
Cossacks: European Wars
Economy ratios, tech order and formation math dominate outcomes
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.