Agree. Superman blitzes her. Physically they should be at similar leagues. Nono stopped planets accelerated to relativistic speeds and like I said shattered the event horizon of a black hole. But her attacks take quite some time and she's slower than Supes already. Her blackhole warping can potentially block attacks but Superman goes for CQC by default. Still, I would love to see a Buster Beam vs Heat Vision competiton.:P
Nono doesn't have any sure FTL feats. Relativistic certainly going by a few scenes with the lasers but that's not enough. Warping via blackholes is considered "teleport". It doesn't give her the combat speed or reactions required to keep up with Superman.
Although she did tank several planet-busters so her durability should be similar to Supes as well. The speed and the flashiness of her moves the real problem here.
Nono could potentially win against modern Superman. However, I feel that with the depth of feats and superior physical attributes the Man of Steel is quite capable of wining this as well. While it seems Nono's max attack level maybe higher than Supes', I feel Supes' can produce higher damage with his casual, "non charging" attacks. (i.e punch to the face)
Physical strength as I said, Supes' has moves 1/3 of the earth before and destroyed moons. His durability to pure force seems to be in the planet plus range.