Free vs. pay versions

[Edward Ned Harvey]

I'm not sure if there was any question in that message, but ...

Free vs commercial is not always a measure of goodness.  Sometimes
commercial offerings are better than free offerings, and sometimes it's
vice-versa.  Depends on how they were engineered mostly, and for what
purpose and scope.

On stability of Centos/RHEL versus fedora, etc ... The main difference is
... Fedora is where experimental bleeding-edge changes take place.  Those
things don't get into RHEL until they're older and more mature.  Take BTRFS
for a perfect example.  Present in Ubuntu/Fedora.  Not present in RHEL yet.