Leadership uncertainty might prompt investors to take a look at Cava.Many investors have debated whether the better fast-casual restaurant stock is Cava Group (CAVA -1.99%) or Chipotle Mexican Grill (CMG -1.33%). Considering that Cava is following Chipotle's playbook, in the Mediterranean food genre, and is a much smaller company, it is a worthy debate.However, the calculus changed upon the announcement last week that CEO Brian Niccol would be leaving Chipotle to take over the top job at Starbucks. Niccol w ...