Phoronix published a review on the Fedora 21 vs. Ubuntu 14.10 Development Benchmarks
A quote from the article:
With the very latest development packages for Ubuntu 14.10 and Fedora 21, here's some new Linux benchmark results when running from the Core i7 5960X platform and using the new MSI X99S SLI PLUSFedora 21 vs. Ubuntu 14.10 Development Benchmarks @ Phoronix