Investors interested in Engineering - R and D Services stocks are likely familiar with Sterling Infrastructure (STRL) and Aecom Technology (ACM) . But which of these two stocks presents investors with the better value opportunity right now? Let's take a closer look.Everyone has their own methods for finding great value opportunities, but our model includes pairing an impressive grade in the Value category of our Style Scores system with a strong Zacks Rank. The Zacks Rank favors stocks with strong earnings ...