The difference between the “freeworld” version and the “regular” fedora version is the way that the packages have been built.
Note that the Audacity development team do not build binaries (the compiled program) for Linux. The Audacity team provide the Audacity sourcecode and the distribution (or PPA) maintainers then package it for their operating system.
The “regular” fedora version of Audacity is built without support for the optional Lame and FFmpeg packages. Lame and FFmpeg allow Audacity to import / export additional file types such as WMA, AC3 and AAC. Lame and FFmpeg may contain code that is subject to patent and/or other licensing issues in some countries.
For support regarding fedora packages you would probably be better to ask the fedora community / maintainers.