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 · Mind & Math
An RTS where Greek, Norse, and Egyptian pantheons lend myth units and god powers to war.

Optimization · Grand Arena
Fast tiberium-economy RTS with a once-thriving competitive 1v1 scene.
Age of Mythology leans Optimization (Mind & Math); Command & Conquer 3: Tiberium Wars leans Optimization (Grand Arena).
Command & Conquer 3: Tiberium Wars leans a little harder on execution, though the gap is small.
Age of Mythology
Standard RTS micro demands
Command & Conquer 3: Tiberium Wars
Fast micro on squads and harvesters
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Age of Mythology
Human opponents and god-power timing bluffs
Command & Conquer 3: Tiberium Wars
Ranked 1v1 rewards reading enemy tech paths
Age of Mythology leans a little harder on variance, though the gap is small.
Age of Mythology
Fog of war and random maps
Command & Conquer 3: Tiberium Wars
Fog hides tech switches until scouted
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Age of Mythology
God choices and favor economy reward planning
Command & Conquer 3: Tiberium Wars
Tight build orders and tiberium control
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.