By default, the noise is convert the procedural noise to be removed or change at anytime, by deactivating the Noise feature or changing zrush different.
The Erosion generator produces a result which is close to the Dents generator except that it focuses on edges rather than surfaces. Enabling the Colors Randomize setting lets you apply a random color on each square by using the ZBrush front color combined with the active color of the Surface settings. I wish I had a better answer for you. The key difference to the noise created by NoiseMaker is that it is being generated in 3D instead of 2D. In classic 3D packages this would be probably called a Noise Deformer or something like that.
