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

Execution · Pure Mechanics
An early arcade climber demanding tight, repeatable jump execution.

Execution · Pure Mechanics
Pioneering rhythm game where a rapping dog believes his way through button-cue raps.
Donkey Kong Junior leans Execution (Pure Mechanics); PaRappa the Rapper leans Execution (Pure Mechanics).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Donkey Kong Junior
precise vine-climbing and jump timing
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.
Donkey Kong Junior
enemies follow fixed patrol patterns
PaRappa the Rapper
No opponent; teachers follow set lines
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Donkey Kong Junior
minor enemy timing variance
PaRappa the Rapper
Songs are fixed sequences
PaRappa the Rapper leans a little harder on optimization, though the gap is small.
Donkey Kong Junior
minimal route memorization needed
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.