Investors interested in stocks from the Large Cap Pharmaceuticals sector have probably already heard of Sanofi (SNY) and Novo Nordisk (NVO). But which of these two stocks is more attractive to value investors? We'll need to take a closer look to find out.There are plenty of strategies for discovering value stocks, but we have found that pairing a strong Zacks Rank with an impressive grade in the Value category of our Style Scores system produces the best returns. The Zacks Rank favors stocks with strong earnings estimate revision trends, and our Style Scores highlight companies with specific traits.Both Sanofi and Novo Nordisk have a Zacks Rank of # 2 (Buy) right now. Investors should feel comfortable knowing that both of these stocks have an improving earnings outlook since the Zacks Rank favors companies that have witnessed positive analyst estimate revisions. But this is just one factor that value investors are interested in.Value investors also tend to look at a number of traditional, tried-and-true figures to help them find stocks that they believe are undervalued at their current share price levels.The Value category of the Style Scores system identifies undervalued companies by looking at a number of key metrics. These include the long-favored P/E ratio, P/S ratio, earnings yield, cash flow per share, and a variety of other fundamentals that help us determine a company's fair value.SNY currently has a forward P/E ratio of 11.14, while NVO has a forward P/E of 33.22. We also note that SNY has a PEG ratio of 1.14. This popular figure is similar to the widely-used P/E ratio, but the PEG ratio also considers a company's expected EPS growth rate. NVO currently has a PEG ratio of 1.76.Another notable valuation metric for SNY is its P/B ratio of 1.64. The P/B ratio pits a stock's market value against its book value, which is defined as total assets minus total liabilities. For comparison, NVO has a P/B of 30.27.These are just a few of the metrics contributing to SNY's Value grade of B and NVO's Value grade of C.Both SNY and NVO are impressive stocks with solid earnings outlooks, but based on these valuation figures, we feel that SNY is the superior value option right now. Zacks Names "Single Best Pick to Double" From thousands of stocks, 5 Zacks experts each have chosen their favorite to skyrocket +100% or more in months to come. From those 5, Director of Research Sheraz Mian hand-picks one to have the most explosive upside of all. It’s a little-known chemical company that’s up 65% over last year, yet still dirt cheap. With unrelenting demand, soaring 2022 earnings estimates, and $1.5 billion for repurchasing shares, retail investors could jump in at any time. This company could rival or surpass other recent Zacks’ Stocks Set to Double like Boston Beer Company which shot up +143.0% in little more than 9 months and NVIDIA which boomed +175.9% in one year.Free: See Our Top Stock and 4 Runners Up >>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 Sanofi (SNY): Free Stock Analysis Report Novo Nordisk A/S (NVO): Free Stock Analysis ReportTo read this article on Zacks.com click here.Zacks Investment Research