Tantanmen is served with a thick sesame-flavored broth, whereas Taiwan Ramen has a thin soup made from a shoyu (soy sauce) and chicken broth base. I would say that Taiwan Ramen is a bit lighter and spicier, while Tantanmen is thick, rich, and filling. The noodles used in both dishes are ramen noodles, but the noodles in Taiwan Ramen are a bit thicker. Both dishes are indeed delicious.