The difference may be no more than the use of suspence, which would include the reward of innovative ideas and surprise. I guess literary is referring to what one might call "art writing" like "art film" versus Hollywood Film. The artist may feel impelled to do away with suspence as a kind of cliche attribute or commercial writing convention. But it does help turn the pages as do a lot of good ideas, images, etc. A real artist has his/her own techniques which they have developed over time, and a lot of thought. One could see suspence as a technique, or rather, maybe one should just have ones own techniques of generating suspence. That might be interesting but it will require research and thought if it hasn't just kind of happened on its own.