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
A football management sim testing tactics, squad building and club economics.
Clash of Clans leans Optimization (Pure Optimization); Football Club Simulator - FCS leans Optimization (Pure Optimization).
Football Club Simulator - FCS leans a little harder on execution, though the gap is small.
Clash of Clans
Troop drop placement is forgiving
Football Club Simulator - FCS
Real-time orders, but no twitch ceiling
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
Football Club Simulator - FCS
Opponent managers offer light tactical prediction
Football Club Simulator - FCS leans a little harder on variance, though the gap is small.
Clash of Clans
Matchmaking and unseen traps add uncertainty
Football Club Simulator - FCS
Match outcomes and player form carry randomness
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
Football Club Simulator - FCS
Squad building, tactics and club finances decide success
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.