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

Optimization · Practiced Mastery
An easygoing co-op Kirby about recruiting enemies as friends and combining their elemental powers.

Optimization · Practiced Mastery
Painterly cinematic puzzle platformer about a girl and her cat-like companion.
Kirby Star Allies leans Optimization (Practiced Mastery); Planet of Lana leans Optimization (Practiced Mastery).
Planet of Lana leans a little harder on execution, though the gap is small.
Kirby Star Allies
Very low difficulty, AI allies carry fights
Planet of Lana
Gentle platforming and chase sequences
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Kirby Star Allies
Friend AI helps rather than opposes
Planet of Lana
Machines follow scripted patterns
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Kirby Star Allies
Fixed layouts and bosses
Planet of Lana
Fully authored puzzles
Planet of Lana leans a little harder on optimization, though the gap is small.
Kirby Star Allies
Friend-ability element combos solve puzzles
Planet of Lana
Companion-command puzzles have single solutions
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.