Investors interested in stocks from the REIT and Equity Trust - Other sector have probably already heard of City Office REIT (CIO) and Stag Industrial (STAG). But which of these two stocks presents investors with the better value opportunity right now? Let's take a closer look.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 proven Zacks Rank puts an emphasis on earnings estimates and estimate revisions, while our Style Scores work to identify stocks with specific traits.Currently, both City Office REIT and Stag Industrial are holding a Zacks Rank of # 2 (Buy). This system places an emphasis on companies that have seen positive earnings estimate revisions, so investors should feel comfortable knowing that these stocks have improving earnings outlooks. But this is just one factor that value investors are interested in.Value investors also try to analyze a wide range of traditional figures and metrics to help determine whether a company is undervalued at its 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.CIO currently has a forward P/E ratio of 12.84, while STAG has a forward P/E of 20.03. We also note that CIO has a PEG ratio of 2.14. 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. STAG currently has a PEG ratio of 4.31.Another notable valuation metric for CIO is its P/B ratio of 2.33. 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, STAG has a P/B of 2.43.Based on these metrics and many more, CIO holds a Value grade of B, while STAG has a Value grade of D.Both CIO and STAG are impressive stocks with solid earnings outlooks, but based on these valuation figures, we feel that CIO is the superior value option right now. Time to Invest in Legal Marijuana If you’re looking for big gains, there couldn’t be a better time to get in on a young industry primed to skyrocket from $17.7 billion back in 2019 to an expected $73.6 billion by 2027. After a clean sweep of 6 election referendums in 5 states, pot is now legal in 36 states plus D.C. Federal legalization is expected soon and that could be a still greater bonanza for investors. Even before the latest wave of legalization, Zacks Investment Research has recommended pot stocks that have shot up as high as +285.9%. You’re invited to check out Zacks’ Marijuana Moneymakers: An Investor’s Guide. It features a timely Watch List of pot stocks and ETFs with exceptional growth potential.Today, Download Marijuana Moneymakers FREE >>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 City Office REIT, Inc. (CIO): Free Stock Analysis Report Stag Industrial, Inc. (STAG): Free Stock Analysis Report To read this article on Zacks.com click here.