Investors looking for stocks in the Retail - Discount Stores sector might want to consider either Burlington Stores (BURL) or Costco (COST) . But which of these two stocks presents investors with the better value opportunity right now? Let's take a closer look.We have found that the best way to discover great value opportunities is to pair a strong Zacks Rank with a great grade in the Value category of our Style Scores system. The proven Zacks Rank emphasizes companies with positive estimate revision trends ...