The main difference is often in the themes and content. New hentia manga might explore more risqué or adult-oriented subjects that traditional manga avoids.
I'm not sure there's a direct relationship. Gun Gale is a manga series and hentia is a genre that often contains inappropriate content. They seem quite distinct and unlikely to have a meaningful connection.
I have no idea about this particular manga. It sounds rather unusual and perhaps not in the mainstream. Usually, hentia manga is of a mature or adult nature and may not be suitable for general audiences.
They often contain explicit and unrestricted content that may not be suitable for all audiences. The graphics and themes can be quite bold and graphic.
Comics are a broad form of visual storytelling that can cover various genres and themes. Hentia, on the other hand, is a specific type of adult-oriented, often explicit content. The main difference is the nature and intended audience.