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
The original historical RTS of advancing ages, booming economies, and rushing armies.

Reads · Mind & Math
Objective-driven MOBA with shared team XP.
Age of Empires 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.
Age of Empires
APM and micro under pressure
Heroes of the Storm
Skillshots and rotations require hands
Heroes of the Storm leans a little harder on reads, though the gap is small.
Age of Empires
Scouting and countering human strategies
Heroes of the Storm
Team-fight cooldown trading is prediction
Age of Empires leans a little harder on variance, though the gap is small.
Age of Empires
Fog of war and map resources
Heroes of the Storm
Map objectives and merc camps vary
Age of Empires leans a little harder on optimization, though the gap is small.
Age of Empires
Build orders and eco timing dominate
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.