Third in the series of Quantal Quetzal releases, is Xubuntu 12.10 after Ubuntu and Kubuntu. Like Kubuntu, Xubuntu also didn't have many significant changes in the new release from the LTS version. The same cannot be said about Ubuntu which did get some new functionalities like web apps, better social integration, etc. These are not there in Xubuntu, Kubuntu or a Lubuntu.
From Ubuntu 12.10