So I saw that ARMSBS has both a web novel and light novel, and as far as I know, usually light novel have a different story than the web novel, but that's usually on the Jp. side. I'm just wondering if the light novel's story is different from the web novel, and if it is, how is it different/what is the difference
Why comment if you aren't answering the question? For korean novels, there is no webnovel/lightnovel difference because they are the same thing. Japanese have a difference only because they have authors who are making the webnovels who get approved to do a lightnovel publication version of their story and they decide they want to make changes for the lightnovel. Basically think of the webnovel like its the unpublished version of a story and the light novel is published. Korean novels aren't really the same in that aspect. I don't think korean webnovels usually get physical versions because usually they are branded to be novels that are bought through apps like Kaokao.