I switched from XLE4 tuning to PMT1 tuning and my truck runs absolutely awesome. It shifts a ton better as well. I had the same tuning with both PCM's and had a chip from DP and TW at the time of the PCM swap. I can say without a doubt that the PMT runs a lot better and shifts like I want it to. I have since had Jody live tune my truck and that made it so much nicer to drive. It is truly a lot of fun to drive.
Southpaw, if Judy felt you needed PMT tuning, he would have done that custom work on your chip already. I doubt you will see any gain from changing unless you do a ton of mods and then Jody prefers the PMT tuning.