Investors with an interest in Aerospace - Defense stocks have likely encountered both Leidos (LDOS) and Lockheed Martin (LMT) . 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 estimate revision t ...