RoostH:
I used both the original version and the one at
http://prolinux.free.fr/scid/The main features, at least the ones I use on a daily basis, are the same for both versions. I chose this branch over the one you mentioned for some minor reason not important enough to remember.
Unfortunately, the developers responsible for the version cited above and ChessDB mentioned by you seem to hate each other. You can find the argument with a quick search if you are curious. Too bad, would be nice to coordinate the efforts, but well...