Investors looking for stocks in the Engineering - R and D Services sector might want to consider either M-tron Industries, Inc. (MPTI) or Howmet (HWM) . 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 ear ...