If your using 2 or more spawners different styles but same or very close colors, you will notice some glitch and color distortion. This is due the shader make a filter between styles by each drop particle color.
Even, if the colors are the same exactly the spawners styles will be clonate between them.
Solution1:
Move the color a little bit of one of them. (see attached gift)
Solution2:
You can change the "Threshold Comparative" value used to discriminate colors until your find a decent result. (see attached gift)