head to head
StarCraft II: Wings of Liberty asks more than Command & Conquer: Red Alert 2, and the gap is execution.

Reads · Grand Arena
Cold-War base-builder where tight production queues and superweapon races define competitive play.

Execution · Grand Arena
Real-time strategy where hands, reads, and build optimization all matter at the top.
Command & Conquer: Red Alert 2 leans Reads (Grand Arena); StarCraft II: Wings of Liberty leans Execution (Grand Arena).
StarCraft II: Wings of Liberty leans clearly harder on execution.
Command & Conquer: Red Alert 2
Superweapon timing and unit grouping require practiced multitasking
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.
Command & Conquer: Red Alert 2
Opponent faction and rush timing must be scouted and predicted
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.
Command & Conquer: Red Alert 2
Map layout is fixed; very little hidden RNG in unit behavior
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.
Command & Conquer: Red Alert 2
Build queues and power grid management are highly optimizable
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.