My personal experience? If you plan on using a carb, use the MSD. With EFI, the Mopar Performance AEM win's hands down.

With these new EFI Hemi's, I have a Rubber Maid box full of EFI tuner's. Superchips, IEMS3, Split Second, SCT/Race Pro, DSP, SMT6, Hypertech, bunch of other's I forgot and a crap load of EFI data logging gizzmo's.

I'll take a carb with a MSD Hemi 6 anyday over anytype of EFI system in an old school swap.