head to head
Super Hexagon asks more than PaRappa the Rapper, and the gap is execution.

Execution · Pure Mechanics
Pioneering rhythm game where a rapping dog believes his way through button-cue raps.

Execution · Pure Mechanics
Terry Cavanagh's minimalist reflex gauntlet of rotating walls measured in seconds survived.
PaRappa the Rapper leans Execution (Pure Mechanics); Super Hexagon leans Execution (Pure Mechanics).
Super Hexagon leans clearly harder on execution.
PaRappa the Rapper
Hitting button cues on beat is the whole game
Super Hexagon
Sub-second reactions at extreme speed, pure reflex ceiling
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
PaRappa the Rapper
No opponent; teachers follow set lines
Super Hexagon
No opponent, only walls
Super Hexagon leans a little harder on variance, though the gap is small.
PaRappa the Rapper
Songs are fixed sequences
Super Hexagon
Pattern order randomized from a known set
PaRappa the Rapper leans a little harder on optimization, though the gap is small.
PaRappa the Rapper
Freestyle scoring quirks for Cool rank
Super Hexagon
Pattern vocabulary is small, reaction is everything
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.