PDMworks Enterprise vs. PDMworks Workgroup

What does PDMworks Enterprise offer that PDMworks Workgroupdoes not? We have three operating units (Ohio, Texas, and Illinois)that would like to utilize the PDMworks Workgroup that comes withSW2007 and I wonder wht the limitations are for the PDMworksWorkgroup.

I am familiar with PDMworks Workgroup but not Enterprise.

Any information is appreciated.

Thanks!SolidworksSolidworks Pdm enterprise Pdm