Short answer
A textile market has rows of display shops where buyers browse catalogues, while a trading tower is an office building where manufacturers, traders and commission agents work from upper-floor offices. Meetings in trading towers are usually booked in advance.
Ring Road has both. Shop-floor markets such as Millennium or Raghukul are ideal for browsing and comparing designs. Office buildings such as Ashoka Tower, Belgium Square and World Trade Center house manufacturers' offices, agents and trading houses.
A good approach: browse the markets in the morning, then meet manufacturers or agents in the trading towers in the afternoon with your shortlist in hand.
Tell us what you're looking for and we'll point you to the right market or supplier.