They are similar, but Chang’s Spicy Chicken recipe has green onions, sweet chili sauce, hoisin sauce, and chili flakes. This recipe calls for ginger, rice vinegar, hot sauce, and brown sugar instead. The tastes are almost the same, but this sweet and spicy chicken is a bit spicier than Chang’s with its hot sauce and red pepper flakes. The chili flakes and hoisin sauce are milder.