Investors interested in Engineering - R and D Services stocks are likely familiar with Babcock International Group PLC (BCKIY) and Quanta Services (PWR) . 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 Zacks Rank favors stocks with strong earnings estimate revision ...