Cava Group's stock may have a promising future, but it may not appear more favorable than Chipotle's upon closer inspection.Chipotle Mexican Grill (CMG 1.85%) has emerged as one of the strongest restaurant stocks in recent years. Its success has led to a gain of more than 110-fold over the last 18 years and, subsequently, an upcoming 50-for-1 stock split.Some hope Cava Group (CAVA 1.54%) is a second-chance stock for those who missed out on Chipotle. Like Chipotle, it is a rapidly expanding restaurant chain ...