The main difference is that noodles labeled "Hong Kong" or "pan-fried noodles" are par-cooked in boiling water, which makes them ready to stir-fry. Use this variety for dry stir-fried noodle dishes, like this Chow Mein With Four Vegetables and whenever you want the noodles to be slightly (or very) crispy.
BuiltaMart is an online premium grocery that provides same day/on-demand delivery in Metro Manila.