Jayco site explains which series gets which parts of the total J-Ride package. It's also possible that smaller coaches within a series don't get the same as bigger ones. Seen that with helper springs, don't know if that still holds.
Looking at the 2018 brochure, every Jayco gets a balanced driveshaft.
Redhawk gets isolator mounts and helper springs.
Greyhawk gets isolator, helper, and finally adds shocks and sway bar.
Seneca's a Super C and the package is entirely different.
Just for me, the biggest thing about J-Ride is that a manufacturer is at least beginning to address Class C Handling.