Apart from business, manga and comics are different when it comes to content. In other words, there’s one kind of core reason why manga has an easier time selling in a bookstore. Manga has one huge advantage, particularly for new readers. It’s very easy to know where to begin. If you look at a book, you can see pretty simply, even from the spines. There are things that are action, sci-fi, and romance, etc. They make it very easy for you to figure out what it is that you’re buying. Unlike American western comics, print manga is just marketed and packaged much easier to be consumed. In other words, if you’re coming in new to a series, most manga books are thereby chapters. You will see the books/chapters ordered numerically.
Nevertheless, it’s incredibly hard to tell where to start with western graphic novels or comics. In plain English, there’s no variety, and that is because most comic books are based on, as people like to say, cape crusaders; basically, people who have superpowers who go around fighting villains and crime. That’s mostly what a lot of people think comic books are all about. There probably are other comic books that aren’t based on this concept, but they’re hard to find if it’s not within Marvel or DC. it’s probably based on Indie shops, or they’re really hard to find in popular bookstores. whereas with manga just going to one store you have a plethora of variety.