I like ramen, but I am careful about frequency of eating ramen.
It is known among Japanese that extreme ramen freaks have short life.
We Japanese maybe tend to be salt addicted.
So careful people eat soup moderately.
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.
I cook my own ramen, and I can assure you is super healthy, because I control the amount of sodium.
I use dashi for the broth, but if you cook your own broth, it's even healthier.