Wat tan hor looks gentler than char kuey teow because it is swimming in a smooth pale gravy instead of a dark oily fry. Do not be fooled. The flat noodles are charred in oil first, then the gravy on top is thickened with starch, bound with egg, and finished with a swirl of oil for that silky texture. Add the pork, prawns and fish cake and you are at around 640 calories with 28g of fat.
The upside is the protein is decent, around 24g, better than a lot of noodle plates. So it is not a terrible order, just a heavy one. Know that the innocent looking gravy is doing real calorie work.