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.

Execution · Pure Mechanics
Cave's hardest bullet hell, built on suicidal close-range scoring and merciless execution demands.

Execution · Pure Mechanics
A precision movement game disguised as a card-action roguelite, decided almost purely by execution.
Ketsui: Kizuna Jigoku Tachi leans Execution (Pure Mechanics); Neon White leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Ketsui: Kizuna Jigoku Tachi
Point-blank chip harvesting in bullet storms, brutal physical ceiling
Neon White
Card-discarding movement tech is the entire game at maximum precision
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Ketsui: Kizuna Jigoku Tachi
Enemies follow fixed scripts
Neon White
Solo time-trial levels; no opponent to read or predict
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Ketsui: Kizuna Jigoku Tachi
Deterministic patterns, trivial randomness
Neon White
Fixed levels with no randomness; entirely deterministic
Ketsui: Kizuna Jigoku Tachi leans a little harder on optimization, though the gap is small.
Ketsui: Kizuna Jigoku Tachi
Multiplier chip routing is a solved-route discipline
Neon White
Route optimisation and card-discard sequencing form the depth layer
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.