My wife claims that the red squirrel hair is better than gray squirrel hair, but I think its because she hates those little red bastards
Having lived in big (and big-ish) cities all my life, it's always a big amusement watching at Youtube the videos of people in the suburbs trying (and failing) to out-smart these intelligent burglars :)
Makes me wonder if her opinion would be better if she source it herself.
Erm... there is a whole bunch of brushes made with a different animal hair/fur. It matters when you know how to use it. It doesn't if your skill tops at a "line and line and a circe - I drew a person".