Is there a link or any side-by-side comparisons detailing why one would choose Kubuntu or Xubuntu over Ubuntu? I am running on a somewhat older machine (Dell optilplex 745 tower), so how would this figure into the decision?
closed as not constructive by Alvar, Thomas W., Eric Carvalho, Jorge Castro, Geppettvs D'Constanzo Apr 22 '13 at 22:21
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I don't have a link handy but the main differences are the following:
There's also Lubuntu and Fluxbuntu which are using different desktop environments, respectively LXDE and Fluxbox. Fluxbox would be the fastest and lightest, but not exactly user-friendly, especially if you come from another non-unix-line Operating System. Other distributions that are lighter and that might work better depending on how old and powerful this computer is, but I will let you do the research about those.
As noted in this answer's comments, LXDE is not actively developed anymore.