head to head
Neither is simply harder - they are hard in different places. EVE Online demands more optimization; Heroes of the Storm demands more execution.

Optimization · Mind & Math
A player-driven economy and political simulation where optimal doctrine-building and reading human opponents decide outcomes.

Reads · Mind & Math
Objective-driven MOBA with shared team XP.
EVE Online leans Optimization (Mind & Math); Heroes of the Storm leans Reads (Mind & Math).
Heroes of the Storm leans clearly harder on execution.
EVE Online
Clicking modules demands little physical precision
Heroes of the Storm
Skillshots and rotations require hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
EVE Online
Player corporations and fleet FC decisions involve deep human prediction
Heroes of the Storm
Team-fight cooldown trading is prediction
EVE Online leans a little harder on variance, though the gap is small.
EVE Online
Market prices and intel gaps are meaningful hidden information
Heroes of the Storm
Map objectives and merc camps vary
EVE Online leans clearly harder on optimization.
EVE Online
Industry chains, fleet doctrines, and trade routes are deeply solvable systems
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.