head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Execution · Pure Mechanics
A classic Contra-style run-and-gun about precise reflexes and firepower.

Execution · Pure Mechanics
Pioneering rhythm game where a rapping dog believes his way through button-cue raps.
Operation C 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.
Operation C
precise run-and-gun reflexes and dodging
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.
Operation C
scripted enemy patterns, no adaptation
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.
Operation C
minimal randomness
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.
Operation C
weapon pickup routing knowledge
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.