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
A short, unsettling visual novel about intrusive thoughts with no skill test.
Higurashi When They Cry Hou: Ch.3 Tatarigoroshi leans Variance (Light / Casual); Milk Inside a Bag of Milk Inside a Bag of Milk 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
Milk Inside a Bag of Milk Inside a Bag of Milk
no physical skill demand at all
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
Milk Inside a Bag of Milk Inside a Bag of Milk
no opponent of any kind
Higurashi When They Cry Hou: Ch.3 Tatarigoroshi leans a little harder on variance, though the gap is small.
Higurashi When They Cry Hou: Ch.3 Tatarigoroshi
Hidden mystery details unfold but story is fixed
Milk Inside a Bag of Milk Inside a Bag of Milk
branching text has minor unpredictability
Same score on optimization - 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
Little to solve mechanically; it is reading
Milk Inside a Bag of Milk Inside a Bag of Milk
barely any systems to solve
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.
full breakdown
Higurashi When They Cry Hou: Ch.3 Tatarigoroshi →
full breakdown
Milk Inside a Bag of Milk Inside a Bag of Milk →