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 · Pure Optimization
Body-altering puzzle platforming where each obstacle has an intended grim solution.

Optimization · Practiced Mastery
A co-op yarn puzzle-platformer where two tethered characters solve levels together.
The Missing: J.J. Macfield and the Island of Memories leans Optimization (Pure Optimization); Unravel Two leans Optimization (Practiced Mastery).
Unravel Two leans a little harder on execution, though the gap is small.
The Missing: J.J. Macfield and the Island of Memories
Platforming is deliberately loose and forgiving
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.
The Missing: J.J. Macfield and the Island of Memories
No adaptive opposition exists
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.
The Missing: J.J. Macfield and the Island of Memories
Hand-crafted puzzles, fixed every run
Unravel Two
Fixed levels, fully visible
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
The Missing: J.J. Macfield and the Island of Memories
Using self-mutilation mechanics correctly per puzzle is the test
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.