both are really good tuning options especially since atr came out. At first, the AP sucked because OTS maps dont work well for this car and you need to be able to tune each car individually. SB is a little more involved and you gotta know what your doing since you start from scratch, the AP you can flash an OTS map and then hop in atr and make some small changes to dial it in. When it came time for me to tune, my final deciding factor at that time was that the only car that had broke 400hp (Robbie's) was using a SB and all of cpe's stuff to get there so I said **** it and got cpe stuff. If cobb still had all their stuff available I would have gotten all their stuff and used an AP to tune.