Walmart can have fabric that is stiffer, but that is the sizing they use.
My first couple quilts I used Walmart fabric, and the seams Poped, it made me sick.
I have stayed with LQS, and some on line purchases. Today I purchased some Hancock, for pillowcases and boxers for my SIL.
The saying you get what you pay for is true. On the other hand, some good buys are Great buys.
Enjoy the Art!
Sue