The light novel of Tensura often has more refined writing. It may go through more editorial processes. For example, the plot development might be more streamlined and the character descriptions more detailed. In contrast, the web novel can be more raw and unfiltered. It might have more of the author's initial ideas and spontaneous developments, with a faster - paced release that allows for more immediate fan feedback to influence the story.
Well, if you're someone who enjoys reading on - line for free and doesn't mind a less refined presentation, the web novel could be great for you. However, if you like to own a physical or digital copy of a more commercially produced product with added extras like illustrations and sometimes exclusive content, then the light novel would be the better option. There's no absolute better one between the two; it really comes down to what you value more in a reading experience.
The web novel often has a more raw and unedited feel. It might have more details in some aspects as it's the original form. The light novel, on the other hand, is more refined for commercial release. It may have better illustrations and a more polished writing style in some cases. Also, the light novel might cut out some overly complex or less relevant parts from the web novel to make it more accessible to a wider audience.
In the light novel, the story content might be more refined. For instance, some minor plot holes in the web novel could be fixed. It often presents a more complete and polished version of the story.