I don't know much about the delete kits or even the 6.7. Asked a question here in a post and haven't gotten any feedback what-so-ever yet so I just went out on a limb and purchased it. Any way its a 2012 with the Delete already done using the H&H MinniMaxx tuner. I haven't had it long but have been able to easily understand and work with the tuner. I have test driven a stock unit as well and can clearly see the difference between stock and tuned and am very pleased with the tuner as is. I netted close to 30MPG taking an easy highway ride and am bouncing between 15 and twenty on the back roads around my area, going up the mountain pass the truck pulls like a freight train and is the first one I ever owned that can get into High gear and stay there starting right from the foot of the mountain.
So to ensure you don't end up like me with no information at all the MinniMaxx so far works great and is easy to use.
By the way if your not a seat belt user like me it lets you turn off the aggravating chime/warning it does not take away the screen prompt that keeps showing when you slow down at a stop or red light but that's not a problem
I hope you enjoy the new truck!