Here is a screen capture of a Ubuntu 8.10 VM and Fedora Core 10 VM running side by
as they download and install the latest updates after the initial installation.

Fedora Core 10 Workstation (left)
Ubuntu 8.10 Workstation (right)

Initially I like the look of Ubuntu a bit more than Fedora. On the flip side a large
amount of the Linux world writes for RedHat/Fedora Core based systems with their RPM
format.

The Debian world does not seem to be as large. I still seem to manage to be pretty
successful with Ubuntu as there is a lot of great documentation resources on the web.