Yes it is much the same as Autodesk owning, marketing and selling AutoCAD, AutoCAD Architecture and Revit all to the same markets. In my experience it works against them more than it works for them.
It "muddies the water" and creates confusion in the marketplace so users don't know who to believe about what product is best becauase they all claim to be the best. So what do they do? They stick with their 3,4,5 year old version till the confusion is reduced or eliminated.
Seems to me it is the same situation for the VWorks and GSoft situation.
And do hear that you cannot swap files between the two makes the water even murkier than before. Same thing exists in the Autodesk world. Seems you would want to push and devote all resources to one or the other but that's just me?
AJ