Fedora 20 Beta vs. Ubuntu 13.10 vs. Scientific Linux 6.4

Fedora 20 Beta vs. Ubuntu 13.10 vs. Scientific Linux 6.4: Last week I shared results of Fedora 19 vs. Fedora 20 Beta Linux performance from an AMD Opteron system and those results were of much interest to many Phoronix readers, so to kick off a new week of Linux benchmarking are results from that system when adding in Ubuntu 13.10 and Scientific Linux 6.4 (RHEL-based) to this Linux OS comparison.