I don't think he was considering the StandBack at this time.
He specifically asked about the Full Throttle Flash vs the AP.
Honestly between the two, I might consider the Piasini Flash instead...nothing but good things. That is if you want a bolt-on type of tuning where you just get flashed and forget about it.
If you plan to continue modding your car and don't plan on stopping with standard mods, then you'll want the CP-E Flash with the StandBack shortly after... Once the AP offers some type of custom tuning then that one too.
But for an ECU type of bolt-on, I would suggest the Piasini; pending a little research on your part just to make sure.
I got the CP-E Flash and I am very happy with it, though it did force me to get a MAP clamp and a MBC...I could have just gotten the StandBack.
Anyway, since the CP-E Flash gives you 100% throttle opening, my boost curve changes and though I was on stock boost, the ECU sensed a difference boost curve and triggered boost cut; I never exceeded max PSI, just held it a little longer.
Anyway, those are other things to consider. If you get the CP-E Flash, probably count on buying a MAP clamp or if you have the budget for it, get the StandBack too (which now comes in PnP). Also, which my stock turbo, the CP-E Flash made me lose a little power at the top end since the stock turbo can't keep up. But that was resolved with a MBC to increase the boost to 18 PSI and now the car just RIPS!!!! (burnout)
Good luck with your decision!!!