The 'Solo Leveling' manga and light novel have several differences. The light novel is the original written form. It goes into great detail about the story's background, characters' inner thoughts, and the overall world - building in a more descriptive way. The manga, on the other hand, is a visual adaptation. It brings the story to life with vivid illustrations. The pacing in the manga can sometimes be adjusted for better visual storytelling. For example, action scenes in the manga may be more dynamic and easier to follow compared to how they are described in the light novel.