Investors with an interest in Oil and Gas - Production and Pipelines stocks have likely encountered both Transportadora De Gas Sa Ord B (TGS) and Williams Companies, Inc. (The) (WMB) . But which of these two stocks is more attractive to value investors? We'll need to take a closer look to find out.There are plenty of strategies for discovering value stocks, but we have found that pairing a strong Zacks Rank with an impressive grade in the Value category of our Style Scores system produces the best returns. ...