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

Optimization · Mind & Math
Console-first RTS translating Halo's factions into streamlined base-and-army battles.

Optimization · Pure Optimization
A slow-burn space RTS blending 4X empire economics with massive real-time fleet battles.
Halo Wars leans Optimization (Mind & Math); Sins of a Solar Empire leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Halo Wars
Controller macro is deliberately light
Sins of a Solar Empire
Slow real-time pace keeps the APM ceiling modest
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Halo Wars
Versus humans, build choices are mindgames
Sins of a Solar Empire
Multiplayer rivals adapt fleet compositions and timings
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Halo Wars
Scouting hides enemy composition early
Sins of a Solar Empire
Fog of war hides enemy buildup
Sins of a Solar Empire leans a little harder on optimization, though the gap is small.
Halo Wars
Build orders and counter-unit economy
Sins of a Solar Empire
Economy, research and fleet counters 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.