I ate quite a lot of Ramen. Some of them, quite delicious... but never a Ramen that I would consider healthy. All the Ramen I ever tasted were too salty and too greasy. Also, unlike most Japanese meals, Ramen is served as a main dish only, without any vegetables on the side. So your meal will consist mainly in white flour, salt and fat. Spaghetti are almost entirely carbohydrates. This is not good or bad, you just need to combine with other foods to make a balanced meal.

Ramen isn't just the noodles, it's also the broth which is usually contains a lot of pork fat.