There would have to be a lot bigger difference in the quality of the service.
My choice is the quality of the service which I cannot see - the quality of the maintenance, and the experience of the flight crews, for two...
At the more expensive inner city store I often find really knowledgeable staff, which may be what I really need to make the most cost effective purchase, or best use of my shopping time. I find Walmart to be hit and miss with staff experience relative to the service being provided.
By extension, lesser experience and "hit and miss" service would not be my preference for airline travel!