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
The definitive transport network sim where perfect rail signaling and routing is the whole game.
Cookie Clicker leans Optimization (Pure Optimization); Transport Tycoon Deluxe leans Optimization (Pure Optimization).
Transport Tycoon Deluxe leans a little harder on execution, though the gap is small.
Cookie Clicker
Clicking is optional past the early game
Transport Tycoon Deluxe
Pausable map clicking, no dexterity
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
Transport Tycoon Deluxe
AI competitors follow simple mappable logic
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Cookie Clicker
Golden cookie timing randomness
Transport Tycoon Deluxe
Industry placement and economy events add slight noise
Transport Tycoon Deluxe leans a little harder on optimization, though the gap is small.
Cookie Clicker
Purchase order and ascension math are the game
Transport Tycoon Deluxe
Signal logic and network throughput are literally an engineering problem
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.