head to head
Ketsui: Kizuna Jigoku Tachi asks more than Super Contra, and the gap is execution.

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

Execution · Practiced Mastery
Memorising spawn patterns then executing them flawlessly under one-hit-death rules.
Ketsui: Kizuna Jigoku Tachi leans Execution (Pure Mechanics); Super Contra leans Execution (Practiced Mastery).
Ketsui: Kizuna Jigoku Tachi leans clearly harder on execution.
Ketsui: Kizuna Jigoku Tachi
Point-blank chip harvesting in bullet storms, brutal physical ceiling
Super Contra
One-hit deaths demand precise dodging and constant accurate fire
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
Super Contra
Alien waves follow fixed spawn scripts
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
Super Contra
Nothing random once spawn patterns are memorised
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
Super Contra
Memorising spawns and weapon routes is half the run
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.