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 · Pure Optimization
A lane-defense strategy game about timing economy and unit upgrades.

Optimization · Pure Optimization
Base-building strategy game about optimizing upgrade economy and raid compositions.
Age of War 2 leans Optimization (Pure Optimization); Clash of Clans leans Optimization (Pure Optimization).
Age of War 2 leans a little harder on execution, though the gap is small.
Age of War 2
Clicking to deploy units, no twitch precision
Clash of Clans
Troop drop placement is forgiving
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Age of War 2
Mostly versus AI; minimal opponent adaptation
Clash of Clans
Base layouts anticipate human attackers' habits
Clash of Clans leans a little harder on variance, though the gap is small.
Age of War 2
Little hidden randomness in unit outcomes
Clash of Clans
Matchmaking and unseen traps add uncertainty
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Age of War 2
Economy timing and unit composition through the ages decides wins
Clash of Clans
Army comps, upgrade paths, and attack routing
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.