RHEL based, 64-bit only, similar to CentOS but has more scientific software and more recent software with third-party repos. Better support for newer file systems, better wireless support. IceWM, KDE, Gnome. Scientifically oriented but can get other apps too. Eye candy. Uses MySQL.
In Ver 7.0: Virtualbox: Distro responsive but pointed not integrated with Scientific guest. Also need to install a pkg mgr/updater and codecs.