The DSP for the newer HEMI trucks (05+) work great, they work even better with the 05's & 06's though cause of the part throttle trans tuning that you do not have to pay for. Plus, dependeing how far you want to take your truck, there are a lot of other adjustments that can be made with it for tuning purposes and custom tuning purposes that SC just does not offer at the moment unless you stack tuners.
Now for the 4.7, I could not tell you which is better or worse. I believe DSP just released the tuner (pogramming) for the 4.7 so they are newer to the game than SC is.
IMO I would look up both tuners, find out what each of them offers for the 4.7, and then decide what you are planning on doing with your truck. If you are keeping it roughly stock with a few minor bolt-on's the newer SC is probably going to be more of what you are going to want. On the other hand though, if you are planning on doing a lot of engine work and mods that need the extra tuning then I would lean more towards the DSP.
Now IF SC ever gets around to adding a few more features like user adjustments for adjusting WOT Fuel/Spark, more aggressive rev limiter, idle etc. as well as complete and reliable custom tuning I will hop back over to the SC familly.
