head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Pure Optimization
Roman city builder about zoning, supply chains and keeping plebs and patricians content.

Optimization · Pure Optimization
First-person puzzle adventure unraveling a Lovecraft-tinged island mystery.
Caesar IV leans Optimization (Pure Optimization); Call of the Sea 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.
Caesar IV
Pause-friendly mouse management; no dexterity ceiling.
Call of the Sea
Walking and clicking, no dexterity test
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Caesar IV
Invasions and gods are scripted, never adaptive.
Call of the Sea
No opponent of any kind
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Caesar IV
Fires, plagues and barbarian timing add mild unknowns.
Call of the Sea
Hidden solutions surprise only once
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Caesar IV
Housing blocks, walker logistics and supply chains are solvable.
Call of the Sea
Deducing fixed puzzle logic is the whole game
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.