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.

Execution · Light / Casual
Wordless watercolor platformer about grief, designed never to punish you.

Execution · Light / Casual
Cheerful physics platformer about a kicking blob toppling a capitalist conspiracy.
Gris leans Execution (Light / Casual); Pikuniku leans Execution (Light / Casual).
Pikuniku leans a little harder on execution, though the gap is small.
Gris
Gentle platforming with no fail state
Pikuniku
Floppy kicks and hops, gently imprecise
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Gris
No opposition at all
Pikuniku
No adversary anywhere
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Gris
Linear and fully authored
Pikuniku
Short authored world with few surprises
Pikuniku leans a little harder on optimization, though the gap is small.
Gris
Light environmental puzzles with obvious solutions
Pikuniku
Simple puzzles with obvious 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.