head to head
Neither is meaningfully harder - they pose close to the same test. The widest gap is optimization, and it is a single point.

Optimization · Systems & Chaos
A hidden-object game testing systematic visual search for hidden cats.

Optimization · Pure Optimization
A supernatural teen drama where dialogue timing shapes relationships against a fixed mystery structure.
100 Istanbul Cats leans Optimization (Systems & Chaos); Oxenfree 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.
100 Istanbul Cats
Scanning and clicking demands no twitch
Oxenfree
Radio tuning and walking demand no physical skill
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
100 Istanbul Cats
Solo hidden-object game, no opponent
Oxenfree
Supernatural narrative with scripted ghost behaviour
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
100 Istanbul Cats
Cat placement hidden until found
Oxenfree
Dialogue timing creates minor branching uncertainty
Oxenfree leans a little harder on optimization, though the gap is small.
100 Istanbul Cats
Systematic scanning of the scene finds every cat
Oxenfree
Relationship and dialogue choices converge toward fixed endings
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.