Fedora 19 vs. Fedora 20 Beta Benchmarks
Fedora 20 Beta brings faster performance compared to stock Fedora 19, but if installing the Fedora 19 Updates you can basically achieve the same level of performance thanks to the Linux 3.11 kernel being available as a stable update.
The open-source graphics performance is one of the areas where the performance is still evolving release-to-release and can make a big deal.