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

Optimization · Pure Optimization
A time-travel puzzle game built entirely on deducing cross-era item interactions with no randomness.
Cookie Clicker leans Optimization (Pure Optimization); Day of the Tentacle leans Optimization (Pure Optimization).
Day of the Tentacle leans a little harder on execution, though the gap is small.
Cookie Clicker
Clicking is optional past the early game
Day of the Tentacle
SCUMM interface eliminates any timing or motor demand
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
Day of the Tentacle
No opponent; multi-era puzzles are fully scripted
Cookie Clicker leans a little harder on variance, though the gap is small.
Cookie Clicker
Golden cookie timing randomness
Day of the Tentacle
Deterministic world state across three time periods
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
Day of the Tentacle
Cross-era cause-and-effect chains form a tightly solvable logic puzzle
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.