Prior to VDT 1.1.13, the European Grid projects (EDG and LCG) received slightly different versions of Globus and Condor. Beginning with VDT 1.1.13, they receive identical versions.
Currently, LCG prefers to install the VDT as a set of RPMS, while most US customers prefer to install the VDT using Pacman. Therefore the VDT supports both installation methods. Currently the LCG uses a subset of the VDT, so not all of the VDT is available as RPMs.
EDG and LCG have donated many patches to Globus, which have improved the stability and functionality of Globus. Many of these patches have been integrated by the Globus team and will be in a future release of Globus.