I see the other forum as a good place for newbies to get good info on their XK. That said, there is a lot of duplication of information there. This forum seems more focused and filled with deeper knowledge of modifying for offroad than the other. That may seem off base, but its how I see things.
I was lead to this forum by members of the other forum to get more information regarding suppliers, etc.... That is a great way to get new members here, but we all have to be active in doing that.
Agree that both forums are getting quiet, but might just be a seasonable thing.