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.

Variance · Light / Casual
A live-action FMV thriller steered through touchpad choices and gestures.

Variance · Light / Casual
An exploration of narrative branches that deliberately tests nothing.
Erica leans Variance (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.
Erica
Touch gestures with no skill ceiling
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.
Erica
No opponent
The Stanley Parable
The narrator is a script, however much he pretends otherwise
Erica leans a little harder on variance, though the gap is small.
Erica
Branch outcomes hidden on first viewing
The Stanley Parable
Endings are hidden information until you wander into them
Erica leans a little harder on optimization, though the gap is small.
Erica
Mapping choice branches across replays
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.