Hi :)
I think the only numbers that would really count would be the combined figures and then combined with other OpenSource products such as Google-docs.
I know some people do work in both projects and some bounce backwards and forwards between the 2. Oracle tried to squish it, to prevent people working on both, so some people just sweated-it-out and others created a 2nd on-line identity. While people higher-up in organisations try to create barriers between people the people doing the work just get on with it and find work-arounds.
My guess is that some people work on various different projects at the same time. It would be nice to have some official liason between them but i can't see anyone really having enough time to do that.
Regards from
Tom :)