head to head
StarCraft II: Wings of Liberty asks more than Gigantic: Rampage Edition, and the gap is execution.

Execution · Grand Arena
A team-based hero shooter testing aim, prediction of opponents, and objective coordination.

Execution · Grand Arena
Real-time strategy where hands, reads, and build optimization all matter at the top.
Gigantic: Rampage Edition leans Execution (Grand Arena); StarCraft II: Wings of Liberty leans Execution (Grand Arena).
StarCraft II: Wings of Liberty leans clearly harder on execution.
Gigantic: Rampage Edition
Aiming abilities and dodging in real-time hero combat matters
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.
Gigantic: Rampage Edition
Predicting human teammates and enemies drives 5v5 outplays
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.
Gigantic: Rampage Edition
Little randomness; outcomes hinge on team play
StarCraft II: Wings of Liberty
map spawns minor; mostly known
StarCraft II: Wings of Liberty leans clearly harder on optimization.
Gigantic: Rampage Edition
Ability upgrades, objective control and team comp planning
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.