Ultimate Edition 2.9 64bit DVD can be used only with 64bit machines. Major difference being that it has been fully updated and has the following environments, user selectable at the login screen: KDE, Xfce, GNOME, LXDE, Openbox. It includes a Conky script which will generate as per each computer. This script will be in your home folder when installed (your choice to run it or not).
About Ultimate Edition
Ultimate Edition, first released in December 2006, is a fork of Ubuntu. The goal of the project is to create a complete, seamlessly integrated, visually stimulating, and easy-to-install operating system. Single-button upgrade is one of several special characteristics of this distribution. Other main features include custom desktop and theme with 3D effects, support for a wide range of networking options, including WiFi and Bluetooth, and integration of many extra applications and package repositories.