head to head
Age of Empires asks more than Empire Earth III, and the gap is variance.

Optimization · Mind & Math
The original historical RTS of advancing ages, booming economies, and rushing armies.

Optimization · Mind & Math
A sloppy RTS still testing build orders and economy ahead of micro.
Age of Empires leans Optimization (Mind & Math); Empire Earth III leans Optimization (Mind & Math).
Age of Empires leans a little harder on execution, though the gap is small.
Age of Empires
APM and micro under pressure
Empire Earth III
Macro speed matters though far less than in tighter RTS peers
Age of Empires leans a little harder on reads, though the gap is small.
Age of Empires
Scouting and countering human strategies
Empire Earth III
Human opponents' timing attacks must be scouted and predicted
Age of Empires leans clearly harder on variance.
Age of Empires
Fog of war and map resources
Empire Earth III
Map starts and AI behaviour hold mild unknowns
Age of Empires leans a little harder on optimization, though the gap is small.
Age of Empires
Build orders and eco timing dominate
Empire Earth III
Epoch timing and economy builds dominate outcomes
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.