We really need to have a good answer to what makes OpenSG and OSG different. Why would someone choose one over the other.
In my opinion we have to give some background here and describe Performer's relationship to FSG. SGI saw that Performer's design had issues. They wanted something better and worked internally for a while then worked on FSG. FSG died, but OpenSG picked up from there and tried to create scenegraph that fixed the problems with previous efforts. OSG started as an opensource implementation of the current concepts from Performer and makes it easy to move from Performer.
This allows us to focus on the differing focus. From there we can get into the capability differences.
It may also be good to have some testimonial links from here were OpenSG users can say why they choose OpenSG over the rest of the pack. (I would be willing to write one)
