head to head
StarCraft II: Wings of Liberty asks more than Overwatch, and the gap is optimization.

Execution · Grand Arena
Team hero shooter blending FPS mechanics with ability economy mind games.

Execution · Grand Arena
Real-time strategy where hands, reads, and build optimization all matter at the top.
Overwatch leans Execution (Grand Arena); StarCraft II: Wings of Liberty leans Execution (Grand Arena).
StarCraft II: Wings of Liberty leans a little harder on execution, though the gap is small.
Overwatch
Hero aim, movement, and ability timing
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.
Overwatch
Ult tracking, flanks, and baiting human teams
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.
Overwatch
Minor spread and matchmaking noise
StarCraft II: Wings of Liberty
map spawns minor; mostly known
StarCraft II: Wings of Liberty leans clearly harder on optimization.
Overwatch
Team comps, ult economy, and positioning theory
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.