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

Optimization · Systems & Chaos
Notorious FMV horror adventure of a writer unraveling her mansion's grisly past.
Oxenfree leans Optimization (Pure Optimization); Phantasmagoria 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.
Oxenfree
Radio tuning and walking demand no physical skill
Phantasmagoria
Point-and-click with rare timed scenes
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
Phantasmagoria
Horror beats are fully scripted
Phantasmagoria leans a little harder on variance, though the gap is small.
Oxenfree
Dialogue timing creates minor branching uncertainty
Phantasmagoria
Deaths and triggers unknown on first run
Oxenfree leans a little harder on optimization, though the gap is small.
Oxenfree
Relationship and dialogue choices converge toward fixed endings
Phantasmagoria
Linear puzzle chains with single 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.