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
Tests squad-building and lane positioning in a tactics system that rewards deep planning.
Clash of Clans leans Optimization (Pure Optimization); Grand Kingdom leans Optimization (Pure Optimization).
Grand Kingdom leans a little harder on execution, though the gap is small.
Clash of Clans
Troop drop placement is forgiving
Grand Kingdom
Timed inputs in battle are forgiving
Clash of Clans leans a little harder on reads, though the gap is small.
Clash of Clans
Base layouts anticipate human attackers' habits
Grand Kingdom
Online war pits you against other players' AI-run squads
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
Grand Kingdom
Enemy squad compositions are hidden until engagement
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
Grand Kingdom
Squad formation, positioning and gear are deeply 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.