Going back to your first response, "My research shows that part number for front and rear shocks are different from non offroad trims vs off road trims. So the 1" inch is from the shocks."
This is incorrect. You've derailed the original conversation to now include coil overs and aftermarket Bilstein shocks that have the spring perch in different locations allowing for different height adjustments utilizing the same spring. Again, the perch the spring sits in is an attachment to the shock, it is not the function of the shock. Shocks do not give you extra height. The spring perch can based on where it's located.
Bilstein is offering an inexpensive, aftermarket way to get some extra lift without buying new springs, but that is not how the factory worked the 1" provided by the ORG. The springs are different, as are the shocks, to support that extra 1" of extension.