Broadly speaking, and I'm sure Arin isn't in a place to comment for legal reasons, what changes are made between oe DP vs aftermarket DP tunes? i.e. stage 1 vs stage 2, assuming you target the same boost.
Like, is it night-and-day differences, or is it just refinements off the same framework of a stage 1 flash?
I'm running the APR dp with an o2 spacer and it seems to be running perfectly and scoots along just fine; no CELs (I presume that means no codes), no abnormal noises, and no abnormal fuel mileage, oil or water temps.
Edit - installed for approx six months and ~3k mi. driven. 91 octane tune.