There are a few differences, primarily that Tacos Dorados are traditionally made with corn tortillas, while quesadillas are usually made with flour. Quesadillas are also loaded with melted cheese, while Tacos Dorados have cheese in the meat, but there are no gooey puddles of melted cheese like in a Quesadilla. These tacos are also folded in a half moon and are meant to be picked up and eaten, whereas quesadillas are usually whole rounds of tortilla cut into wedges.