Out of the costa vida, cafe rio, and chipotle style restaurants Chipotle is by far the best.

For those who say they aren't even the same style of restaurant, you are wrong. All three describe (or at least used to, havent checked recently) themselves as "Mexican Grills" on their websites and operate in an "assembly line" fashion. Also their menus largely offer the same items.

The only difference is really taste due to the way things are cooked and seasoned. If that makes them not even the same type of restaurant than I guess Burger King, wendys, and McDonalds are totally different styles of restaurants too.