Hello
As far as I know , Andrea and Prince August are both manufactured by Vallejo. It could just be three different guises of the same stuff, but a retailer/modeler told me that the Vallejo hues were slightly different now. Take a look at their site : http://www.acrylicosvallejo.com
Hope this will help you some way.
PS This post would have been better placed in the " Painting and Airbrushing" forum