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 · Light / Casual
A branching visual novel testing only route mapping across fixed story paths.

Variance · Light / Casual
An exploration of narrative branches that deliberately tests nothing.
Psycho-Pass: Mandatory Happiness leans Optimization (Light / Casual); The Stanley Parable leans Variance (Light / Casual).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Psycho-Pass: Mandatory Happiness
Reading text requires no inputs of consequence
The Stanley Parable
Walking is the only input
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Psycho-Pass: Mandatory Happiness
Scripted branching characters cannot adapt
The Stanley Parable
The narrator is a script, however much he pretends otherwise
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Psycho-Pass: Mandatory Happiness
Branch outcomes are hidden until a route is explored
The Stanley Parable
Endings are hidden information until you wander into them
Psycho-Pass: Mandatory Happiness leans a little harder on optimization, though the gap is small.
Psycho-Pass: Mandatory Happiness
Mapping choice trees to endings is light solvable work
The Stanley Parable
Finding all branches is a trivial checklist
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.