The 'Dead Tube' manga is the actual content that readers enjoy. The manager, on the other hand, has to deal with behind-the-scenes stuff like coordinating with artists, publishers, and promoting it. Sometimes, the manager's decisions might influence the way the manga is presented or released.
The key distinction is that 'hentai sex manga tube' is specifically for mature audiences due to its adult-oriented nature. Regular manga offers a much broader range of stories and styles that can appeal to people of various ages and interests.
Choso is not dead in the manga. The plot hasn't taken that turn. Usually, character deaths are significant events and for Choso, that hasn't happened yet.