Pretty sure there have been no changes to the chassis suspension pick up points since the start of production. There have been changes to the front upright steering arm height, later uprights having the higher steering arm position rather than the Comfort Kit.
If you are happy with the way your car handles Wilson, leave it as it is. It will probably feel better with the later chassis anyway. My car did after its chassis change to a post 2014 specification one for some unknown reason. I think the changes with the Empire or Alains kit are not as noticeable as the improvements with the Comfort Kit, or its changes built in as they are now.
