Over-priced gunk.
Taco Bell, while fine in a pinch, in my opinion is very low quality food. There is no way they can compete in Mexico, where delicious food can be had for cheap.
I don’t know about Chipotle, since I’m not a customer, but I believe they serve “New Mexico” style food, which is almost certainly better quality than Taco Bell, and might lend itself to clever promotion.