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
Painterly cinematic puzzle platformer about a girl and her cat-like companion.

Optimization · Practiced Mastery
A co-op yarn puzzle-platformer where two tethered characters solve levels together.
Planet of Lana leans Optimization (Practiced Mastery); Unravel Two leans Optimization (Practiced Mastery).
Unravel Two leans a little harder on execution, though the gap is small.
Planet of Lana
Gentle platforming and chase sequences
Unravel Two
Light platforming plus two-character swing coordination
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
Planet of Lana
Machines follow scripted patterns
Unravel Two
No adaptive opposition, co-op only
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
Planet of Lana
Fully authored puzzles
Unravel Two
Fixed levels, fully visible
Unravel Two leans a little harder on optimization, though the gap is small.
Planet of Lana
Companion-command puzzles have single solutions
Unravel Two
Puzzles solved by routing two yarn characters together
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.