The manwha is generally more popular. It has a wider reach because it's a visual medium. People who might not be into reading long texts can easily get into the story through the manwha.
Well, in the Solo Leveling manwha, the story is presented through vivid illustrations. You can see the cool character designs and epic battle scenes right away. But in the light novel, you have to use your imagination more. The manwha might cut out some of the more detailed descriptions in the light novel to fit the story into the visual medium. However, the light novel often has more in - depth internal monologues of the characters which can give a deeper understanding of their motives.
Yes, it is quite popular. 'Solo Leveling' has a large and dedicated fan base around the world. The story, with its unique take on the isekai and leveling - up genre, has captured the imaginations of many readers. It features an interesting protagonist and a well - developed power - up system that keeps readers engaged from start to finish.
Solo Leveling is both. It originated as a web novel and was then transformed into a manga. The manga adaptation brought the story to life visually for many fans.