Both stocks are reeling this year, but one has a much clearer path to glory.In a year where the S&P 500 has returned 16%, it's striking to see shares of both Shake Shack (SHAK +0.19%) and Chipotle (CMG +0.21%) suffer so badly. Both stocks are down more than 30% year to date, and while the entire fast-casual dining sector has been under pressure this year, that doesn't fully explain their sell-offs. After all, the AdvisorShares Restaurant ETF, a pure-play fund designed to track the broader sector, is down on ...