The blog post compares Next.js 12 with the newly released Next.js 13, focusing on several key differences and advancements between the two versions. It delves into pre-rendering techniques, highlighting the distinctions between Static Site Generation (SSG) and Server-side Rendering (SSR), and introduces the concept of server components, which are processed server-side without sending JavaScript to the client, thereby enhancing performance. The post also explores changes in file structure and routing, noting that Next.js 13 organizes routes by directories and supports HTTP methods directly in route files. Data fetching in Next.js 13 is simplified through the use of server components, eliminating the need for SSR functions like getServerSideProps. The blog concludes by inviting readers to explore more Next.js content and join the AuthTown community, emphasizing Descope’s support for Next.js in authentication and identity management applications.