I had heard that JoAnns bought second run (somewhat lesser quality) fabric than what is in a LQS; this includes some the "branded" fabric like Kaufmans that I have seen there. However, I noticed that they have started carrying a higher priced (feels better as well) batiks and other cottons under the "Premium and Artist Brands." JoAnn's carries a lot of their "own" named fabric.
I have bought the Legacy line batiks and have been happy with them.
I think you have to feel the fabric and see if you like it. It depends on the printing process used by the manufacturer. Check the country of origin on the label on the bolt and see if there is a consistent feel to fabrics from the same country.
I bought some nice velvet and home decor fabrics there.
Hancock's carries a little better fabric than JoAnns. Same with Beverly's.