head to head
Neither is harder. They score identically on all four axes, so the difference between them is in kind, not degree.

Optimization · Practiced Mastery
Tests puzzle solving by picking the right blob transformation for each fixed obstacle.

Optimization · Practiced Mastery
A gentle physics puzzle-platformer starring a creature made of unraveling yarn.
A Boy and His Blob leans Optimization (Practiced Mastery); Unravel leans Optimization (Practiced Mastery).
Same score on execution - which means the number cannot separate them. The difference is in what each one asks of you.
A Boy and His Blob
Gentle platforming with forgiving timing
Unravel
Gentle platforming and yarn-swing timing
Same score on reads - which means the number cannot separate them. The difference is in what each one asks of you.
A Boy and His Blob
Solo puzzle world - nothing adapts
Unravel
No opponent
Same score on variance - which means the number cannot separate them. The difference is in what each one asks of you.
A Boy and His Blob
Levels are fixed; secrets known after one find
Unravel
Everything is visible and fixed
Same score on optimization - which means the number cannot separate them. The difference is in what each one asks of you.
A Boy and His Blob
Choosing the right bean transformation per obstacle is the puzzle
Unravel
Physics puzzles with discoverable intended 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.