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

Execution · Practiced Mastery
A licensed brawler testing combat timing and memorised boss patterns.

Execution · Practiced Mastery
Sequel refining the fast rabbit platforming with co-op and multiplayer modes.
Dragon Ball: Revenge of King Piccolo leans Execution (Practiced Mastery); Jazz Jackrabbit 2 leans Execution (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Ball: Revenge of King Piccolo
Combo timing and platforming reflexes carry the levels
Jazz Jackrabbit 2
Fast movement, ammo juggling, tight jumps
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Ball: Revenge of King Piccolo
Bosses run scripted patterns, never adapt
Jazz Jackrabbit 2
Mainly scripted; light multiplayer modes existed
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Ball: Revenge of King Piccolo
Level content is fixed after one playthrough
Jazz Jackrabbit 2
Deterministic levels
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Dragon Ball: Revenge of King Piccolo
Learning boss movesets and stage routes is the rest
Jazz Jackrabbit 2
Weapon choice and secret routes
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.