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
Large-scale RTS famous for strategic zoom, thousand-unit armies, and a streaming mass-energy economy.
Guild Wars leans Optimization (Pure Optimization); Supreme Commander leans Optimization (Pure Optimization).
Supreme Commander leans a little harder on execution, though the gap is small.
Guild Wars
Interrupt timing and kiting in skirmishes
Supreme Commander
Massive APM demands across strategic-zoom battlefields
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
Supreme Commander
PvP hinges on scouting and countering opponent commitments
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Guild Wars
Modest drop and spawn randomness
Supreme Commander
Deterministic engine; only unscouted intel
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
Supreme Commander
Streaming economy and build-order efficiency are the backbone
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.