Performance requirements. Both need to have grades, some are assigned by leaders, and some are books that they find themselves. It is difficult to find a suitable author for a book, because there are many words and the author needs to write for a long time. Some journals need authors to contribute, while others need interviews. If it is an interview, you need some writing skills.
Writing, text modification. Book editors also need to write, such as book reviews and book news. Some periodical editors need to interview and write, and the requirements are not very high. Both need retouching.
Generally speaking, there is little difference between them, and they can exchange roles, unless they are professional periodical editors or book editors. Personally, I think it depends on my level and the company I work for. If the company is strong, it is conducive to promotion. If the company is depressed, I may want to leave for a while.