Well, cartoon cave walls typically have elements like bold lines, fantasy creatures or objects, and a style that stands out. Sometimes they tell a story or convey a certain mood through the imagery.
To start with, you should know about the diverse genres in manhwa, like fantasy, romance, and action. Another must is being familiar with popular manhwa titles and their creators. Also, keep an eye on the evolving trends in the manhwa industry.
One of the main differences is that Hideo Azuma's manga might focus more on psychological depth and character introspection. Also, the visual aesthetics could be more avant-garde compared to typical manga.