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

Optimization · Pure Optimization
The archetypal idle game where optimal purchase order is the entire skill.

Optimization · Pure Optimization
A survival city builder driven by harsh resource and law optimization.
Cookie Clicker leans Optimization (Pure Optimization); Frostpunk 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.
Cookie Clicker
Clicking is optional past the early game
Frostpunk
Pausable strategy with no input precision.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Cookie Clicker
No opponent
Frostpunk
No adaptive opponent in the survival city.
Frostpunk leans a little harder on variance, though the gap is small.
Cookie Clicker
Golden cookie timing randomness
Frostpunk
Scenario events and weather pulses add tension.
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Cookie Clicker
Purchase order and ascension math are the game
Frostpunk
Resource routing, laws, and heat 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.