head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is execution, and it is a single point.

Optimization · Grand Arena
The genre-defining historical RTS, still alive on the ladder.

Reads · Grand Arena
Modern-warfare RTS with general-specific powers where faction counters and production efficiency are central.
Age of Empires II: Definitive Edition leans Optimization (Grand Arena); Command & Conquer: Generals leans Reads (Grand Arena).
Age of Empires II: Definitive Edition leans a little harder on execution, though the gap is small.
Age of Empires II: Definitive Edition
micro and macro APM at high ladder
Command & Conquer: Generals
Supply drop timing and unit special abilities require precise activation
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Age of Empires II: Definitive Edition
PvP ladder rewards adaptation
Command & Conquer: Generals
Three-faction asymmetry and general powers must be predicted constantly
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Age of Empires II: Definitive Edition
random map spawns minor
Command & Conquer: Generals
Supply depot placement is map-fixed; minimal in-game RNG
Age of Empires II: Definitive Edition leans a little harder on optimization, though the gap is small.
Age of Empires II: Definitive Edition
civ build orders deeply mapped
Command & Conquer: Generals
General power sequencing and unit composition are well-solvable
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.