From my perspective WV and WE are "two leaves on the same tree" to cite Country Mike. I also think that there is considerable value in comparing and evaluating our collective experiences. WE has learned a lot from the WMF projects and we try to learn from these experiences. For example -- I was very surprised to see the productivity of the WE community comparing the ratio of pages to registered users.
We've been pretty successful in extending our work in the developing world and as Brent has pointed out, a lot of energy goes into capacity development in using MW technology.
For those interested -- you can view our daily stats here:
Ultimately the diversity in our OER projects will contribute to a better world for all involved.