Investors with an interest in Financial - Investment Management stocks have likely encountered both Atlas (ATCO) and T. Rowe Price (TROW). But which of these two stocks presents investors with the better value opportunity right now? Let's take a closer look.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 Zacks Rank is a proven strategy that targets companies with positive earnings estimate revision trends, while our Style Scores work to grade companies based on specific traits.Atlas and T. Rowe Price are sporting Zacks Ranks of #1 (Strong Buy) and #2 (Buy), respectively, right now. This system places an emphasis on companies that have seen positive earnings estimate revisions, so investors should feel comfortable knowing that ATCO is likely seeing its earnings outlook improve to a greater extent. But this is just one piece of the puzzle 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.The Style Score Value grade factors in a variety of key fundamental metrics, including the popular P/E ratio, P/S ratio, earnings yield, cash flow per share, and a number of other key stats that are commonly used by value investors.ATCO currently has a forward P/E ratio of 10.41, while TROW has a forward P/E of 14.86. We also note that ATCO has a PEG ratio of 0.67. 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. TROW currently has a PEG ratio of 1.26.Another notable valuation metric for ATCO is its P/B ratio of 0.95. 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, TROW has a P/B of 5.19.These metrics, and several others, help ATCO earn a Value grade of B, while TROW has been given a Value grade of D.ATCO stands above TROW thanks to its solid earnings outlook, and based on these valuation figures, we also feel that ATCO 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 Atlas Corp. (ATCO): Free Stock Analysis Report T. Rowe Price Group, Inc. (TROW): Free Stock Analysis Report To read this article on Zacks.com click here.