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
Pure call-and-response rhythm timing with a freestyle layer for top ranks.
Muse Dash leans Execution (Pure Mechanics); PaRappa the Rapper 2 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 2
Hitting button cues on beat is the entire 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 2
Teachers rap fixed lines, nothing adapts
PaRappa the Rapper 2 leans a little harder on variance, though the gap is small.
Muse Dash
Fully deterministic note charts
PaRappa the Rapper 2
Songs are fully deterministic call-and-response
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 2
Freestyle scoring for Cool rank rewards learned improvisation patterns
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.