The price of the SAME cloth is totally different in different shop, so you'd better stroll several stores, and compare the products and their prices.
Generally speaking, the marked price in the stores in Sichuan Bei Lu is comparatively lower, and the stores in Nanjing Lu have spacious shopfront and old brand, with acceptable price, while in Huaihai Lu, the shops all take the white-collar and fashionable youth, so have a higher price.