Tesco v Aldi: I did my weekly shop at both supermarkets and one was much cheaper Aldi is famous for keep its prices very low, but how does Tesco measure up? Sign up to FREE email alerts from Wales Online - Subscribe When you subscribe we will use the information you provide to send you these newsletters. Your information will be used in accordance with ourPrivacy Notice. Thank you for subscribingWe have more newslettersShow meSee ourprivacy notice The discount supermarket chain keeps its prices low by avoiding many big-brand names, instead opting for a small selection of their own branded products.