Investors interested in stocks from the Internet - Commerce sector have probably already heard of Expedia (EXPE) and Amazon (AMZN). But which of these two stocks is more attractive to value investors? We'll need to take a closer look to find out.We have found that the best way to discover great value opportunities is to pair a strong Zacks Rank with a great grade in the Value category of our Style Scores system. The Zacks Rank favors stocks with strong earnings estimate revision trends, and our Style Scores highlight companies with specific traits.Expedia and Amazon are sporting Zacks Ranks of #2 (Buy) and #3 (Hold), respectively, right now. The Zacks Rank favors stocks that have recently seen positive revisions to their earnings estimates, so investors should rest assured that EXPE has an improving earnings outlook. But this is just one piece of the puzzle for value investors.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.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.EXPE currently has a forward P/E ratio of 19.27, while AMZN has a forward P/E of 75.37. We also note that EXPE has a PEG ratio of 1.57. This popular metric is similar to the widely-known P/E ratio, with the difference being that the PEG ratio also takes into account the company's expected earnings growth rate. AMZN currently has a PEG ratio of 2.28.Another notable valuation metric for EXPE is its P/B ratio of 3.50. The P/B is a method of comparing a stock's market value to its book value, which is defined as total assets minus total liabilities. By comparison, AMZN has a P/B of 20.35.These are just a few of the metrics contributing to EXPE's Value grade of A and AMZN's Value grade of D.EXPE stands above AMZN thanks to its solid earnings outlook, and based on these valuation figures, we also feel that EXPE is the superior value option right now.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 Expedia Group, Inc. (EXPE): Free Stock Analysis Report Amazon.com, Inc. (AMZN): Free Stock Analysis Report To read this article on Zacks.com click here. Zacks Investment Research