The Highschool DxD manga has indeed finished. It wrapped up after completing all the planned story arcs and providing a satisfying conclusion for the readers.
The Highschool DxD manga has gone a long way, presenting detailed plots and character developments. However, to know exactly how far it has gone, you might need to check the latest releases or related manga forums for the most up-to-date information.
The Highschool DxD manga has gone a long way, presenting exciting adventures and romantic elements. But as with any manga, its continuation and extent are subject to multiple factors like popularity and the creator's vision.
The art style is a major difference. In the manga, you get to see the characters and scenes visually depicted in a more immediate way compared to the light novel. The light novel often has more detailed descriptions of the inner thoughts of characters, like Issei's pervy thoughts which are sometimes more in - depth in the written form.