The latest desktops bring additional polish with much faster metadata handling, a new print manager and improved bluetooth integration in KDE’s Plasma Desktop and improved notifications, better file management and account integration for Exchange and Windows Live in GNOME Shell.
They have also dropped Oracle's MySql and replaced it with Maria DB. Plus some other new features.
12.3 brings new technologies to users with the inclusion of PostgreSQL 9.2 which comes with native JSON support (noSQL style). We’ve moved over from MySQL to MariaDB as default. This is the first openSUSE release with a complete OpenStack “Folsom” for cloud fans and this release debuts the E17 desktop and the Sawfish and awesome window managers.
OpenSUSE is considered by many to be the alternative to Mandriva even if Fedora also could partly fill those shoes. OpenSUSE is the basis of SUSE Linux Enterprize.
You know - the one Microsoft will let you use....