The terms refer to two distinct physical formats for books, primarily differentiated by their construction and intended audience. One features thick, rigid pages made of compressed paperboard, designed for durability. The other utilizes thinner paper pages bound within a flexible cover, offering a more traditional reading experience.
The selection of one format over the other significantly impacts a book’s longevity and suitability for specific reading environments. The robust nature of one makes it ideal for withstanding the handling of young children. The portability and cost-effectiveness of the other often make it a preferred choice for older readers and larger print runs. Historically, publishing decisions have considered these factors to maximize market reach and product lifespan.