The onlyother, non nylon coated, flats I’ve used are La Bella DTFs and the Cobalts are much more roundwound sounding to my ears. I initially bought a set for one of fretless basses to preserve the board and sound in the ball park as roundwounds on other basses. I liked them so much that they are now my go to string, whether fretted or fretless. They don’t have that top end zing of new roundwounds, but very much like old ones, with added benefit in that they take years to go off and, even then, they’re still very useable. With regard to feel, they’re smooth enough, but not overly glassy, finger noise won’t be an issue. They sound great with a pick too, nice and snarly with a bit of drive added.