I have the superride and the only difference is the LCAs (that and you don't get discos).
Honestly, mine flexed great. Enough to rub on the fenders at full stuff with my tire/wheel setup (31x10.50 Kumho MTs on 15x8 Soft 8s 4" BS) and the swaybar discod. It comes with new sway bar links, you just have to unbolt the bottom nut and tie them up (takes like 5 minutes).
To me, I haven't noticed much of a smoother ride than my buddy with the Superflex version. Deciding on which one to get is more of a street/trail driving ratio
If you DD your jeep more than ride trails, the Superride is fine.
If your rig sees more trail time than street time, get the Superflex or you'll eat up the rubber bushings on the Superride LCAs.