Phoronix: Red Hat Enterprise Linux 6.2 vs. Its Derivatives

Does Red Hat Enterprise Linux perform any better (or worse) than the various "Enterprise Linux" distributions that are derived from RHEL? Now that Scientific Linux 6.2 was released, here is a performance comparison of Red Hat Enterprise Linux, Oracle Linux, CentOS, and Scientific Linux across three different systems.

http://www.phoronix.com/vr.php?view=17093