Autodesk Vault Workgroup 2011 includes all the functionality of Autodesk Vault 2011
PLUS
Autodesk® Vault Workgroup, part of the Autodesk solution for Digital Prototyping, helps design teams easily create and share digital prototyping information by securely organizing, managing, and tracking data from a central location. Design teams can administrate access and control, allowing team-based development across disciplines to quickly find and track the when, why, and who of design changes. Team-based collaboration helps users gain productivity without disruption to their natural design workflows. In addition, Vault Workgroup delivers revision and lifecycle control processes directly in the design application, which results in faster cycle times and better-quality engineering data.
Vault Family 2011 Comparison Matrix
Vault Family 2011 What's New 
Top Ten Reasons to Move to Vault Family 2011 from Vault 
Vault Family 2011 Product Brochure 