Robert Kauffman has responded to the enquiries about Kona many times. There is only one. No differing qualities for different stores.
As mentioned in a previous thread, I found Kona to be horrible to work with. I did a bit of an experiment with several different brands of white fabric. If you want to see them, you can view the pics, videos and comments here:
https://www.facebook.com/media/set/?...2001936&type=3