The Start menu gets two columns, and now it is completely customizable by the user. The appearance of windows shell elements such as desktops, taskbar, start menu, get a better design with transparent icons and shadow drops. Windows XP has a lot of updates in the user interface (compared to Windows ME and 2000), making it easier to use and navigate through files and programs.
While these features are not available in the Home version.
Professional version of the operating system have more features such as backup program, encrypted file systems (EFS) feature, remote control, offline files, IIS, etc.