Investors with an interest in Medical - Dental Supplies stocks have likely encountered both Henry Schein (HSIC) and The Cooper Companies (COO). But which of these two stocks is more attractive to value investors? We'll need to take a closer look to find out.The best way to find great value stocks is to pair a strong Zacks Rank with an impressive grade in the Value category of our Style Scores system. The proven Zacks Rank puts an emphasis on earnings estimates and estimate revisions, while our Style Scores work to identify stocks with specific traits.Henry Schein and The Cooper Companies are sporting Zacks Ranks of #2 (Buy) and #4 (Sell), respectively, right now. This system places an emphasis on companies that have seen positive earnings estimate revisions, so investors should feel comfortable knowing that HSIC is likely seeing its earnings outlook improve to a greater extent. But this is only part of the picture for value investors.Value investors analyze a variety of traditional, tried-and-true metrics to help find companies that they believe are undervalued at their current share price levels.Our Value category highlights undervalued companies by looking at a variety of key metrics, including the popular P/E ratio, as well as the P/S ratio, earnings yield, cash flow per share, and a variety of other fundamentals that have been used by value investors for years.HSIC currently has a forward P/E ratio of 16.97, while COO has a forward P/E of 29.33. We also note that HSIC has a PEG ratio of 1.50. This metric is used similarly to the famous P/E ratio, but the PEG ratio also takes into account the stock's expected earnings growth rate. COO currently has a PEG ratio of 2.67.Another notable valuation metric for HSIC is its P/B ratio of 2.67. The P/B ratio is used to compare a stock's market value with its book value, which is defined as total assets minus total liabilities. For comparison, COO has a P/B of 2.92.Based on these metrics and many more, HSIC holds a Value grade of A, while COO has a Value grade of C.HSIC is currently sporting an improving earnings outlook, which makes it stick out in our Zacks Rank model. And, based on the above valuation metrics, we feel that HSIC is likely the superior value option right now. Zacks Top 10 Stocks for 2022 In addition to the investment ideas discussed above, would you like to know about our 10 top picks for the entirety of 2022? From inception in 2012 through November, the Zacks Top 10 Stocks gained an impressive +962.5% versus the S&P 500’s +329.4%. Now our Director of Research is combing through 4,000 companies covered by the Zacks Rank to handpick the best 10 tickers to buy and hold. Don’t miss your chance to get in on these stocks when they’re released on January 3.Be First To New Top 10 Stocks >>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Henry Schein, Inc. (HSIC): Free Stock Analysis Report The Cooper Companies, Inc. (COO): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research