head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Optimization · Mind & Math
A sloppy RTS still testing build orders and economy ahead of micro.

Optimization · Mind & Math
Console-first RTS translating Halo's factions into streamlined base-and-army battles.
Empire Earth III leans Optimization (Mind & Math); Halo Wars leans Optimization (Mind & Math).
Empire Earth III leans a little harder on execution, though the gap is small.
Empire Earth III
Macro speed matters though far less than in tighter RTS peers
Halo Wars
Controller macro is deliberately light
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Empire Earth III
Human opponents' timing attacks must be scouted and predicted
Halo Wars
Versus humans, build choices are mindgames
Halo Wars leans a little harder on variance, though the gap is small.
Empire Earth III
Map starts and AI behaviour hold mild unknowns
Halo Wars
Scouting hides enemy composition early
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Empire Earth III
Epoch timing and economy builds dominate outcomes
Halo Wars
Build orders and counter-unit economy
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.