head to head
StarCraft II: Wings of Liberty asks more than Grey Goo, and the gap is execution.

Reads · Grand Arena
Three-faction sci-fi RTS where asymmetric Goo mechanics and unit counter-selection drive competitive outcomes.

Execution · Grand Arena
Real-time strategy where hands, reads, and build optimization all matter at the top.
Grey Goo leans Reads (Grand Arena); StarCraft II: Wings of Liberty leans Execution (Grand Arena).
StarCraft II: Wings of Liberty leans clearly harder on execution.
Grey Goo
Goo expansion rate timing and unit special abilities need precise control
StarCraft II: Wings of Liberty
APM, macro, micro-control under pressure
StarCraft II: Wings of Liberty leans a little harder on reads, though the gap is small.
Grey Goo
Three-faction asymmetry makes opponent tech choices hard to predict
StarCraft II: Wings of Liberty
1v1 ladder vs adaptive humans modeling you
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Grey Goo
Map resource spread is fixed; minimal in-game RNG
StarCraft II: Wings of Liberty
map spawns minor; mostly known
StarCraft II: Wings of Liberty leans a little harder on optimization, though the gap is small.
Grey Goo
Goo creep routing and tech order are well-defined optimization problems
StarCraft II: Wings of Liberty
build orders, economy curves heavily solved
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.