head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is reads, and it is a single point.

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

Optimization · Pure Optimization
Tests turn-based positioning and resource play, sharpened by human opponents online.
Clash of Clans leans Optimization (Pure Optimization); Skulls of the Shogun leans Optimization (Pure Optimization).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Clash of Clans
Troop drop placement is forgiving
Skulls of the Shogun
Turn-based orders need no dexterity
Skulls of the Shogun leans a little harder on reads, though the gap is small.
Clash of Clans
Base layouts anticipate human attackers' habits
Skulls of the Shogun
Human multiplayer rewards anticipating opponent plans
Clash of Clans leans a little harder on variance, though the gap is small.
Clash of Clans
Matchmaking and unseen traps add uncertainty
Skulls of the Shogun
Little hidden beyond minor attack variance
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
Skulls of the Shogun
Positioning, skull-eating economy and zone control are 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.