The Eminence in Shadow's light novel and web novel have several distinctions. Firstly, the light novel usually undergoes more editorial scrutiny, so the grammar and overall structure are better. In the web novel, it might be more experimental in terms of storytelling techniques. Secondly, the light novel may have some additional backstories or explanations for characters and events. For example, character motives might be more clearly elaborated in the light novel. Moreover, the art and illustrations in the light novel can enhance the reading experience in a way that the web novel, which is mainly text - based, cannot.
The main difference lies in the pacing. The light novel often has a more refined pacing, with more detailed descriptions and character development. The web novel, on the other hand, might be a bit more fast - paced and rough around the edges. Also, the light novel may have some exclusive story arcs or details that are not in the web novel.
Well, in the light novel of 'The Eminence in Shadow', the writing style is more polished. It has a more consistent tone and the language used is of a higher quality. In the web novel, sometimes you can find a more spontaneous and unfiltered style. The plot in the light novel may also be more streamlined and easier to follow compared to the web novel, which can at times be a bit more convoluted as it might have been written more in the moment without as much overall planning.