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
Designing animal habitats that satisfy complex welfare systems while maintaining zoo profitability.

Optimization · Pure Optimization
A stealth game demanding meticulous route planning and equipment management to avoid guards who cannot be reliably fought.
Planet Zoo leans Optimization (Pure Optimization); Thief: The Dark Project 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.
Planet Zoo
Animal habitat and path construction demands deliberate precision
Thief: The Dark Project
Combat is deliberately weak; sword timing matters only as last resort
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Planet Zoo
Animals and guests follow scripted need systems
Thief: The Dark Project
Guards use scripted patrol routes with no adaptive player modelling
Thief: The Dark Project leans a little harder on variance, though the gap is small.
Planet Zoo
Animal welfare stats have minor stochastic variation
Thief: The Dark Project
Guard alert states and random patrol timings introduce mission variance
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Planet Zoo
Species welfare requirements and financial management are fully solvable
Thief: The Dark Project
Route planning, equipment loadout, and objective prioritisation are deeply 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.