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
Kirby's breezy Game Boy debut, floating and inhaling through five short dreamlike stages.

Execution · Practiced Mastery
Loose action platforming with branching mission routes to optimise for endings.
Kirby's Dream Land leans Execution (Practiced Mastery); Shadow the Hedgehog 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.
Kirby's Dream Land
Gentle platforming, harder in Extra Mode
Shadow the Hedgehog
Platforming and gunplay control, loose but central
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
Bosses loop tiny fixed patterns
Shadow the Hedgehog
Enemies are scripted regardless of faction choice
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
Nothing hidden after one loop
Shadow the Hedgehog
Mission branches are player-chosen, not random
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
Short fixed levels, simple boss study
Shadow the Hedgehog
Routing mission paths for endings and ranks is the meta
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.