When you buy a supercar, you want it to have a sense of occasion. Just looking at it in the garage, blasting down the highway, or even starting it up should all be filled with glory and awesome. And starting up 100 in succession becomes a hypnotizing soundtrack of barks, coughs, and growls.
Quiet supercars are generally not made. When it starts up, you want wee onlookers and scared pedestrians to know just exactly it is that they're dealing with. Whether you have 8, 10, 12, or 16 cylinders they all come together in a symphony of the machine when you put 100 of them in a row.
Now the dilemma is to find out which sounds the best. My vote is for the Enzo.