Investors interested in stocks from the Business - Services sector have probably already heard of WNS (Holdings) Limited (WNS) and Thomson Reuters (TRI) . 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 proven Zacks Rank emphasiz ...