Has there ever been an anime that is longer than its corresponding manga series?

Yes, it's possible. Sometimes anime producers decide to expand the story or create new arcs that weren't in the manga. Take 'Fullmetal Alchemist: Brotherhood' for instance, which followed the manga closely but also had some additional elements.

Yes, there have been cases. Sometimes an anime might expand on the story or add filler episodes to prolong the series.

Yes, it can. Sometimes an anime might add filler episodes or expand on certain storylines to make it longer than the original manga.

Yes, there have been cases. Sometimes, anime projects get greenlit based on a concept or early drafts before the manga is fully developed.

Yes, there have been. Some original anime are created without being based on any existing manga. For example, 'Neon Genesis Evangelion' was an original concept developed directly for the anime medium.

It can vary. Sometimes the anime follows the manga closely, but there can also be changes and additions to make it more suitable for animation.

Not all anime have a manga counterpart. Some are original creations made specifically for animation.

I think 'One Piece' manga is better. The anime sometimes has filler episodes that disrupt the flow of the story.

The main distinctions often lie in the level of detail. The manga can offer more intricate backgrounds and character designs. In the anime, the color palette and music can greatly impact the mood. And sometimes, storylines might be reordered or simplified to fit the animation format.

Many novels have more than 1000 chapters, especially those that are very popular. There may be many revised versions or many authors writing different chapters, so the total number of chapters may exceed 1000.