Username or EmailPassword
First of all, Fedora is hardly the best distro for experienced users. Such a distro would be Arch or Debian. However, beyond that, Ubuntu has some clear advantages from fedora, starting from the fact that apt is (from my experience) vastly superior to yum, continuing with the much bigger support base and the larger amount of packages in the official repositories, and finishing up with the fact that Fedora's "newer technologies" tend to be on the unstable side.
In addition, you claim RH is the "granddady of all modern mainstream Linux distributions". This is patently false. Ubuntu, Knoppix, (insert countless LiveCDs here), MEPIS and others are all Debian-based. In addition, there's Arch, Slackware and Gentoo, which all use their package management own system.