Investors interested in stocks from the Medical Services sector have probably already heard of Icon PLC (ICLR) and Charles River Laboratories (CRL) . But which of these two stocks presents investors with the better value opportunity right now? Let's take a closer look.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 w ...