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 · Pure Optimization
Instanced online RPG where deck-like eight-skill builds decide battles before they begin.

Optimization · Pure Optimization
A slow-burn space RTS blending 4X empire economics with massive real-time fleet battles.
Guild Wars leans Optimization (Pure Optimization); Sins of a Solar Empire leans Optimization (Pure Optimization).
Guild Wars leans a little harder on execution, though the gap is small.
Guild Wars
Interrupt timing and kiting in skirmishes
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.
Guild Wars
GvG and arena metagame against adapting humans
Sins of a Solar Empire
Multiplayer rivals adapt fleet compositions and timings
Sins of a Solar Empire leans a little harder on variance, though the gap is small.
Guild Wars
Modest drop and spawn randomness
Sins of a Solar Empire
Fog of war hides enemy buildup
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Guild Wars
Eight-skill build construction is the game's soul
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.