The "Crawl" mode on the Superchips works for any JK. The Rubi gains the ability to turn ONE locker on in 4Hi (not both, sadly).
Also, I've driven both back-to-back in stock X's (6-speed, 29" tires, 33 PSI in each, 3.21's- as scientific as we can get, I suppose) on the same day (mine and a friend's- mine with Superchips, his with Hypertech)- mine had noticably more power down low, and I averaged slightly better fuel economy on a convoyed road trip. The fuel economy could be due to my talented right foot. The power, however, was definitely there. We even did a dino drag race, and I pulled ahead noticably by third.
Hope this helps- Mark W.