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

Execution · Pure Mechanics
Nintendo's minigame rhythm collection where everything reduces to feeling the beat exactly.

Execution · Pure Mechanics
Combo execution and dodge timing through scripted grindhouse brawls.
Rhythm Heaven Fever leans Execution (Pure Mechanics); Shank leans Execution (Pure Mechanics).
Rhythm Heaven Fever leans a little harder on execution, though the gap is small.
Rhythm Heaven Fever
Strict beat-perfect timing windows across minigames
Shank
Combo juggling and dodge timing carry every brawl
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Rhythm Heaven Fever
Scripted rhythm patterns only
Shank
Enemies and bosses attack on fixed patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Rhythm Heaven Fever
Minor visual fakeouts, audio is fully fixed
Shank
Hand-built levels with no randomness
Shank leans a little harder on optimization, though the gap is small.
Rhythm Heaven Fever
Little to plan, internalize the beat and go
Shank
Weapon-swap combo routing rewards some lab work
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.