Ubuntu Server: It is designed for servers. It focuses on low resource use, security, and performance. Ubuntu Desktop: Built for regular users with a graphical interface for ease of use.
Ubuntu Desktop comes with a graphical user interface. Ubuntu Server is command-line only.
The Desktop version is designed for daily use. Server version is optimized for hosting applications and services.
Ubuntu Server uses fewer resources, making it ideal for high-performance needs. The Desktop version requires more memory and processing power due to the GUI.
Ubuntu Server: Hosting, cloud computing, databases. Ubuntu Desktop: Everyday computing, office work.