head to head
Command & Conquer: Red Alert asks more than Fat Princess, and the gap is optimization.

Optimization · Pure Optimization
Alternate-history RTS where economy management and build orders win wars.

Optimization · Mind & Math
Team objective tug-of-war testing class economy and reading the other team's pushes.
Command & Conquer: Red Alert leans Optimization (Pure Optimization); Fat Princess leans Optimization (Mind & Math).
Command & Conquer: Red Alert leans a little harder on execution, though the gap is small.
Command & Conquer: Red Alert
Micro and base management under time pressure
Fat Princess
Simple hack-and-slash actions per class
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Command & Conquer: Red Alert
PvP skirmish rewards predicting enemy pushes
Fat Princess
Predicting enemy team pushes and rescues is constant
Command & Conquer: Red Alert leans a little harder on variance, though the gap is small.
Command & Conquer: Red Alert
Fog of war conceals army composition
Fat Princess
Minor spawn and map noise
Command & Conquer: Red Alert leans clearly harder on optimization.
Command & Conquer: Red Alert
Ore economy and build orders decide games
Fat Princess
Class economy, cake feeding and upgrade timing win matches
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.