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
A supernatural teen drama where dialogue timing shapes relationships against a fixed mystery structure.

Optimization · Systems & Chaos
Puzzle adventure about coaxing a giant half-tame creature through ancient ruins.
Oxenfree leans Optimization (Pure Optimization); The Last Guardian leans Optimization (Systems & Chaos).
The Last Guardian leans a little harder on execution, though the gap is small.
Oxenfree
Radio tuning and walking demand no physical skill
The Last Guardian
Slow climbing and platforming, very forgiving
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Oxenfree
Supernatural narrative with scripted ghost behaviour
The Last Guardian
Trico is willful but not modeling you adversarially
The Last Guardian leans a little harder on variance, though the gap is small.
Oxenfree
Dialogue timing creates minor branching uncertainty
The Last Guardian
Trico's unpredictable compliance adds noise
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Oxenfree
Relationship and dialogue choices converge toward fixed endings
The Last Guardian
Environmental puzzles with intended solutions
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.