Investors interested in Outsourcing stocks are likely familiar with ExlService Holdings (EXLS) and Automatic Data Processing (ADP) . 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. The Zacks Rank favors stocks with strong earnings es ...