head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Systems & Chaos
Puzzle adventure about coaxing a giant half-tame creature through ancient ruins.

Optimization · Systems & Chaos
A casual zoo management sim about building exhibits and keeping visitors happy.
The Last Guardian leans Optimization (Systems & Chaos); Zoo Park leans Optimization (Systems & Chaos).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
The Last Guardian
Slow climbing and platforming, very forgiving
Zoo Park
minimal input skill, simple clicking
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
The Last Guardian
Trico is willful but not modeling you adversarially
Zoo Park
no adaptive opponent, solo park sim
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
The Last Guardian
Trico's unpredictable compliance adds noise
Zoo Park
random visitor/animal events
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
The Last Guardian
Environmental puzzles with intended solutions
Zoo Park
economy and layout management dominate
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.