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

Execution · Practiced Mastery
Charming physics toy about a wobbly robot climbing a giant plant into the sky.

Execution · Practiced Mastery
A dark puzzle-platformer about a tiny girl in a grotesque world.
Grow Home leans Execution (Practiced Mastery); Little Nightmares 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.
Grow Home
Procedural hand-over-hand climbing coordination
Little Nightmares
Stealth platforming demands timing.
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Grow Home
No opposition of any kind
Little Nightmares
Enemies are scripted.
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Grow Home
World fixed; little hidden
Little Nightmares
Minimal randomness.
Little Nightmares leans a little harder on optimization, though the gap is small.
Grow Home
Vine routing toward floating islands
Little Nightmares
Routes have fixed 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.