I have 4 different kabuki brushes. 1 I bought from eBay (very rough, sheds worse than my cats), 1 I got from sephora, 1 from Clarins and the MAC 182.
The one from Sephora was pretty ok to use at first, but once I tried the 182 and the one from Clarins, I just realized how rough it is. The Clarins brush is definitely softer than the 182, but 182 is a lot fuller. I now use both interchangeably. They're wonderful!