국(guk)
Clear, light soup usually eaten with rice
When to use
Clear soup with rice, Light broth dish, Basic side soup during meals
The nuance
Guk has clear broth and relatively simple ingredients, often served as a side with rice during meals. It is typically a basic soup served alongside other dishes.
찌개(jji-gae, jjigae)
Thick, ingredient-rich stew usually eaten as a side dish
When to use
Ingredient-rich thick stew, Side dish with rich broth, For drinking snacks or rich flavor
The nuance
Jjigae contains various ingredients and has a thick or rich broth. It is mainly eaten as a side dish with rice and is heavier and more flavorful than guk.