Overall, Dragon Ball R and R manga share the basic framework and some key events. However, the manga might have more detailed character development and a different pacing. Also, the art might vary in terms of shading and panel layout.
Rated R manga often have content that is considered too intense or inappropriate for general audiences. It could be due to excessive horror, strong language, or controversial subject matter.
Overall, R15 manga is distinct. It often features more mature content and a specific target audience, which makes it stand out compared to common manga genres. There are differences in the storylines, art styles, and the way characters are developed.