Investors interested in stocks from the Business - Services sector have probably already heard of BGSF (BGSF) and WNS Holdings Limited (WNS). But which of these two stocks offers value investors a better bang for their buck right now? We'll need to 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.Right now, both BGSF and WNS Holdings Limited are sporting a Zacks Rank of # 2 (Buy). This means that both companies have witnessed positive earnings estimate revisions, so investors should feel comfortable knowing that both of these stocks have an improving earnings outlook. 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.Our Value category grades stocks based on a number of key metrics, including the tried-and-true P/E ratio, the P/S ratio, earnings yield, and cash flow per share, as well as a variety of other fundamentals that value investors frequently use.BGSF currently has a forward P/E ratio of 12.77, while WNS has a forward P/E of 26.53. We also note that BGSF has a PEG ratio of 0.64. 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. WNS currently has a PEG ratio of 2.02.Another notable valuation metric for BGSF is its P/B ratio of 2.11. 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, WNS has a P/B of 6.37.These metrics, and several others, help BGSF earn a Value grade of A, while WNS has been given a Value grade of C.Both BGSF and WNS are impressive stocks with solid earnings outlooks, but based on these valuation figures, we feel that BGSF is the superior value option right now. Bitcoin, Like the Internet Itself, Could Change Everything Blockchain and cryptocurrency has sparked one of the most exciting discussion topics of a generation. Some call it the “Internet of Money” and predict it could change the way money works forever. If true, it could do to banks what Netflix did to Blockbuster and Amazon did to Sears. Experts agree we’re still in the early stages of this technology, and as it grows, it will create several investing opportunities. Zacks’ has just revealed 3 companies that can help investors capitalize on the explosive profit potential of Bitcoin and the other cryptocurrencies with significantly less volatility than buying them directly. See 3 crypto-related stocks 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 BGSF, Inc. (BGSF): Free Stock Analysis Report WNS Holdings Limited (WNS): Free Stock Analysis Report To read this article on Zacks.com click here.