OOPS I MEANT WHICH IS HARDER

NC by far, the ship part is really hard, and the cube part at the end requires good muscle memory.
In jawbreaker, the ship part is easier. The beginning cube is easier. The wave lasts from pretty much 35% to the end of the level, whereas in NC it takes up less time.

I beat both, I will check my attempts...

k

Nine circles -> 6763 att
Jawbreaker -> 2118 att

I really thought Jawbreaker was harder before beating them xD