Pad Thai and Pad Woonsen are both stir fried noodle dishes from Thailand. That's about where the similarities end, however. Pad Thai features rice noodles cooked with a sweet and sour sauce, along with tofu, shrimp, bean sprouts, garlic chives, and peanuts. Pad Woonsen features bean thread noodles cooked with a savory sauce, chicken, and a medley of vegetables. In addition, Pad Thai is meant to be eaten as a stand-alone dish while Pad Woonsen is often served as part of a family meal.