Preheat grill. Rub each tenderloin with spice rub and season with salt. Grill for 4 to 5 minutes per side, brushing with the bbq sauce every few minutes. Let rest 10 minutes and slice on the bias into 1/2-inch thick slices. Place 3 to 4 slices of pork on each roll, top with some of the peppers and onions and a dollop of Mango Ketchup.
Spicy Mango Ketchup:
Heat olive oil in a medium saucepan over medium heat. Add the onions and garlic and cook until soft. Add the cinnamon, allspice, cloves and habanero and cook an additional 1 minute. Add the mango and continue cooking until softened, about 5 to 7 minutes. Place the mango mixture into the bowl of a food processor, add the vinegar and process until smooth. Season with salt and pepper to taste. Serve at room temperature.