I don't know what I'm doing myself sometimes, but the link I gave you was the newer one, you asked "Which one is newer?". I would type up the differences between both of them if I knew it all myself. I'm quite sure the download page tells you what it does.
But on the top of my head, the one I gave you has had more work put into how to swaybars work, and how the suspension and tyres effect your handling on the road depending on your tyre pressure and suspension setup.
