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

Optimization · Pure Optimization
On-rails photography game about provoking and capturing the perfect Pokémon shot.
Planet Zoo leans Optimization (Pure Optimization); Pokémon Snap leans Optimization (Pure Optimization).
Pokémon Snap leans a little harder on execution, though the gap is small.
Planet Zoo
Animal habitat and path construction demands deliberate precision
Pokémon Snap
Timing photos on a moving rail
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
Pokémon Snap
Creature behavior is fully scripted
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Planet Zoo
Animal welfare stats have minor stochastic variation
Pokémon Snap
Minor behavioral wiggle per run
Planet Zoo leans a little harder on optimization, though the gap is small.
Planet Zoo
Species welfare requirements and financial management are fully solvable
Pokémon Snap
Triggering rare poses is route knowledge
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.