Front springs and leaf springs in different 2016 models?

Aee the front spring rates and leaf springs different in the 2016 OR versus the Limited? My son has an OR and I have a Limited with the Bilstein 5100s. Big difference between the Hitachis and the Bilsteins. But my son's OR still rides tighter yet more compliant. This may be due to different springs among the different trim levels, or may be related to more unsprung weight with the 18" wheels on the Limited.

Need some input.

 

My bilsteins on or springs have stiffened up my ride for the better. My sr5 has the same suspension as the limited and it was super soft. Like diving a Cadillac. Instead of absorbing bumbs it would buonce over them. Since the upgrade my back is feelimg much better with less bouncing.
Edit. I am running a 16 x 8 rim with the stock wranglers with kevlar.