1.8t boost question

[Audi You Do]

Recently fitted a boost gauge to my a4 1.8t BEX engine code and ive noticed the peak boost is around 15-16 psi and it settles down to around 10 psi, is this because it is a BEX 190 do they run higher boost that the usual 7-8 psi i hear most standard 1.8t's run at

Either the BEX 190 is higher boost standard or the boost has been turned up i have seen when tuning people set the max boost at 1 bar just below 15 psi so im thinking the car must be remapped 

Anyone got any ideas whats going on thanks