I don't think it's fair to compare Ubuntu to Fedora. Ubuntu encompasses the mindset of both RHEL and Fedora. With Ubuntu versions, the LTS releases are like RHEL and the non-LTS releases are like Fedora.
I'm a proponent of RHEL/Fedora, but still, Ubuntu can upgrade from LTS to bleeding edge fairly easily. Try that with RHEL.
My experience has been to have trouble with both bleeding edges, Fedora or non-LTS Ubuntu. I don't freak out though, as I know the purpose of the bleeding edge is to suffer the bugs so the RHEL/LTS folks of the world don't have to. That said, using a release backward from current for Fedora or non-LTS Ubuntu usually is pretty stable, supposing you're on your game enough to upgrade before repo EOL.
I'm a proponent of RHEL/Fedora, but still, Ubuntu can upgrade from LTS to bleeding edge fairly easily. Try that with RHEL.
My experience has been to have trouble with both bleeding edges, Fedora or non-LTS Ubuntu. I don't freak out though, as I know the purpose of the bleeding edge is to suffer the bugs so the RHEL/LTS folks of the world don't have to. That said, using a release backward from current for Fedora or non-LTS Ubuntu usually is pretty stable, supposing you're on your game enough to upgrade before repo EOL.
/endrant