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 successor deduction game demanding systematic elimination across interconnected mystery tableaux.
Cookie Clicker leans Optimization (Pure Optimization); Rise of the Golden Idol 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
Rise of the Golden Idol
Interface identical to predecessor; no physical demands
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
Rise of the Golden Idol
Scripted mystery scenes have no adaptive opponent
Rise of the Golden Idol leans a little harder on variance, though the gap is small.
Cookie Clicker
Golden cookie timing randomness
Rise of the Golden Idol
Hidden roles and motives form layered investigative uncertainty
Rise of the Golden Idol leans a little harder on optimization, though the gap is small.
Cookie Clicker
Purchase order and ascension math are the game
Rise of the Golden Idol
Closed-world deduction chain converges to exactly one correct answer per scene
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.