The one that you have pictured is done the same way that I did mine. It is just the way I wanted it to sound. It is a little louder than stock but not obnoxious. It is a copy of the PSE (Stage One mod) without the cutoff/shutoff valve that Porsche had to add to pass noise in some countries.
It has a lower gutteral sound under load at lower RPMs and starts to get noticably louder from ~4500 up, there is no drone.
More coupe owners seem to go for the Stage Two mod. That is louder throughout the RPM range, still with no drone.
pictured here:
FD Motorsports » Fister Exhaust – 996