I have the Superchips so it is all I can attest to. Superchips claims roughly 20 rear wheel HP and TQ on our trucks. I believe it probably is there....only thing is it doesn't come around until about 4400 RPM. How often does your truck see 4400 RPM? Mine doesn't very often. That being said, I am most pleased with the Superchips because of the improved transmission functions. Only catch there is that I don't think the tune for your model year alters the transmission parameters. I think only 2005-up trucks get the tranny tuning. I do not know that for certain and you should verify it yourself before discounting the Superchips.
06-08 chrome clads w/33" Cooper Discoverer H/T Plus, Mopar tailgate spoiler, debadged door trim & tailgate emblems, 13" antenna, LED dome & maps, Magnaflow 22" SI/DO, 18% tint, "HEMI" hood spears, VHT tinted tails & third brake light, Lamin-x optic blue fogs, leveled w/McGaughys 2" drop shackles.