The difference between monopolistic competition and pure competition is that in comparison to pure competition, monopolistic competition has fewer firms, product differentiation, some price control, and relatively easy but not barrier-free entry. more firms, no product differentiation, no price control, and relatively easy but not barrier-free entry. fewer firms, product differentiation, some price control, and barrier-free entry. more firms, product differentiation, some price control, and barrier-free entry. b. the difference between monopolistic competition and pure monopoly is that in comparison to monopolistic competition, pure monopoly has at least one competitor, a patented product, little price control, and few entry barriers. at least one firm, a patented product, some price control, and few entry barriers. one firm, a patented product, some price control, and entry barriers. one firm, a unique product, price control, and entry barriers. c. product differentiation provides an advantage in the market. describes registered differences in product characteristics. only occurs when there is brand loyalty. is usually nonexistent.