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
Base-building strategy game about optimizing upgrade economy and raid compositions.

Optimization · Pure Optimization
Gunpowder-era Total War blending empire management with line battles.
Clash of Clans leans Optimization (Pure Optimization); Empire: Total War leans Optimization (Pure Optimization).
Empire: Total War leans a little harder on execution, though the gap is small.
Clash of Clans
Troop drop placement is forgiving
Empire: Total War
Real-time battle micro is modest
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Clash of Clans
Base layouts anticipate human attackers' habits
Empire: Total War
Multiplayer line-battle feints exist
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Clash of Clans
Matchmaking and unseen traps add uncertainty
Empire: Total War
Campaign AI and battle dice noise
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Clash of Clans
Army comps, upgrade paths, and attack routing
Empire: Total War
Campaign economy and line-infantry tactics are mappable
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.