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 proven Zacks Rank emphasizes companies with positive estimate revision trends, and our Style Scores highlight stocks with specific traits. Investors interested in stocks from the Medical - Instruments sector have probably already heard of Hologic (HOLX) and Edwards Lifesciences (EW) . But which of these two sto ...