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

Variance · Light / Casual
A horror sound-novel chapter testing attention to an unfolding rural mystery.

Variance · Light / Casual
An exploration of narrative branches that deliberately tests nothing.
Higurashi When They Cry Hou: Ch.3 Tatarigoroshi 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.
Higurashi When They Cry Hou: Ch.3 Tatarigoroshi
Reading text; no physical demand
The Stanley Parable
Walking is the only input
Higurashi When They Cry Hou: Ch.3 Tatarigoroshi leans a little harder on reads, though the gap is small.
Higurashi When They Cry Hou: Ch.3 Tatarigoroshi
Authored mystery with no adaptive opponent
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.
Higurashi When They Cry Hou: Ch.3 Tatarigoroshi
Hidden mystery details unfold but story is fixed
The Stanley Parable
Endings are hidden information until you wander into them
The Stanley Parable leans a little harder on optimization, though the gap is small.
Higurashi When They Cry Hou: Ch.3 Tatarigoroshi
Little to solve mechanically; it is reading
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.