head to head
Unravel Two asks more than Brothers: A Tale of Two Sons, and the gap is optimization.

Optimization · Practiced Mastery
A wordless fairy-tale adventure controlled with one stick per brother.

Optimization · Practiced Mastery
A co-op yarn puzzle-platformer where two tethered characters solve levels together.
Brothers: A Tale of Two Sons leans Optimization (Practiced Mastery); Unravel Two leans Optimization (Practiced Mastery).
Unravel Two leans a little harder on execution, though the gap is small.
Brothers: A Tale of Two Sons
Controlling two brothers on one pad takes coordination
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.
Brothers: A Tale of Two Sons
No opponent
Unravel Two
No adaptive opposition, co-op only
Unravel Two leans a little harder on variance, though the gap is small.
Brothers: A Tale of Two Sons
Fully scripted journey
Unravel Two
Fixed levels, fully visible
Unravel Two leans clearly harder on optimization.
Brothers: A Tale of Two Sons
Light environmental puzzles with 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.