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
Cute two-button rhythm game where everything reduces to hitting notes on beat.

Execution · Pure Mechanics
Pioneering rhythm game where a rapping dog believes his way through button-cue raps.
Muse Dash leans Execution (Pure Mechanics); PaRappa the Rapper leans Execution (Pure Mechanics).
Muse Dash leans a little harder on execution, though the gap is small.
Muse Dash
Two-lane rhythm hits at high BPM are pure hands
PaRappa the Rapper
Hitting button cues on beat is the whole game
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Muse Dash
Charts never adapt
PaRappa the Rapper
No opponent; teachers follow set lines
PaRappa the Rapper leans a little harder on variance, though the gap is small.
Muse Dash
Fully deterministic note charts
PaRappa the Rapper
Songs are fixed sequences
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Muse Dash
Character buffs and chart memorization help margins
PaRappa the Rapper
Freestyle scoring quirks for Cool rank
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.