Mom and pop grocery stores hardly ever sell different products from the supermarket. They will have less product diversity, higher prices and less fresh stock o

Mom and pop grocery stores hardly ever sell different products from the supermarket. They will have less product diversity, higher prices and less fresh stock of perishables (vegetables, etc). They work out best if they specialise in less in-demand items, like asian stores or fruit stores (where freshness of produce is their sole goal). But at the same time these simply can't exist every few blocks or so by the nature of being specialised.