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 Key visual novel about found family and baseball, with minigames feeding a devastating true route.

Optimization · Light / Casual
A gorgeous first-person mystery about piecing together a boy's disappearance.
Little Busters! leans Variance (Light / Casual); The Vanishing of Ethan Carter leans Optimization (Light / Casual).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Little Busters!
Light minigames: baseball practice, battle ranker
The Vanishing of Ethan Carter
Walking and looking, nothing more
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Little Busters!
Minigame rivals are scripted
The Vanishing of Ethan Carter
No opponent
Little Busters! leans a little harder on variance, though the gap is small.
Little Busters!
Hidden route gates and randomized minigame events
The Vanishing of Ethan Carter
The mystery is hidden only until discovered
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Little Busters!
Route order and flag management toward Refrain
The Vanishing of Ethan Carter
Reconstructing event sequences is light deduction
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.