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

Optimization · Practiced Mastery
A gentle pastel Kirby platformer whose real challenge is solving each level's hidden heart-star condition.

Optimization · Practiced Mastery
A relaxed collect-athon testing character-ability matching far more than any skill ceiling.
Kirby's Dream Land 3 leans Optimization (Practiced Mastery); LEGO Batman 2: DC Super Heroes leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
Kirby's Dream Land 3
Gentle platforming with float as a safety net
LEGO Batman 2: DC Super Heroes
Button-mashing combat designed for children's hands
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Kirby's Dream Land 3
Scripted enemies throughout
LEGO Batman 2: DC Super Heroes
Enemies are harmless scripted waves
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Kirby's Dream Land 3
Fixed level layouts
LEGO Batman 2: DC Super Heroes
Stud and minikit locations are fixed once known
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
Kirby's Dream Land 3
Heart-star puzzles need the right ability-animal combos
LEGO Batman 2: DC Super Heroes
Matching character abilities to gated collectibles
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.