After more testing I found that while the diablo is not overly impressive on top, the throttle response and low end make it worthwhile. It actually runs cooler than juice at cruising speeds and WOT runs on extreme are the same as setting 4 on the hot juice. It makes less timing rattle and just a little more smoke. I haven't tried extreme stacked with setting 5 on the juice because I'm afraid my clutch will slip but setting 4 combined with extreme on the diablo is very inpressive and it makes 45 lbs of boost. I also have yet to make the truck pop like it is draining the rail. Overall the diablo is very friendly towards the juice IMHO.