Steak- Chipotle's steak is cooked sous-vide off site to medium rare, then marinated in store with Adobo. Qdoba's comes raw and premartinated in adobo. It depends on my mood, but I prefer Chipotle's steak in terms of flavor but Qdoba has better quality and texture IMO. Carnitas/Pulled Pork- Chipotle's comes precooked and is boiled in a bag. More @Wikipedia
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