The GS is a remarkable car but for everyday use, the GT/GTS is better in terms of comfort (long journeys etc) whereas the GS would be the car you would take out on an evening for a thrill up a country road where you push the sport button and the noise is unleashed but if you have skyhook that sometimes can be a bad thing due to ride comfort and things but the GT/GTS's are a bit big and therefore hard to park are they not? And ill add the Granturismos sports noise is even better in my opinion than the Gransports!
I would have to concede that the GTS is a better sounding car than the GS. The GS you can add noise that makes it sound epic, but the GTS comes out the box sounding amazing.
Its a very different sound, like the Merc 6.3
One of the best if not the best and that's stock from the factory......Would not know why you would ever need to make it louder...Stunning..