head to head
StarCraft asks more than Guild Wars, and the gap is execution.

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

Optimization · Grand Arena
A real-time strategy classic where perfected build orders and mechanical speed decide most matches.
Guild Wars leans Optimization (Pure Optimization); StarCraft leans Optimization (Grand Arena).
StarCraft leans clearly harder on execution.
Guild Wars
Interrupt timing and kiting in skirmishes
StarCraft
APM and micro control ceiling is huge
StarCraft leans a little harder on reads, though the gap is small.
Guild Wars
GvG and arena metagame against adapting humans
StarCraft
scouting and predicting human opponent builds
Guild Wars leans a little harder on variance, though the gap is small.
Guild Wars
Modest drop and spawn randomness
StarCraft
minimal hidden info beyond fog of war
StarCraft leans a little harder on optimization, though the gap is small.
Guild Wars
Eight-skill build construction is the game's soul
StarCraft
build orders and economy are near-solvable
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.