2nd, I've test driven the mk5 VW Jetta and the Audi A3 TDI and didn't notice any difference in sound. I didn't use a db meter or anything, this was just based on a short drive. The Audi did feel slightly different but it's also slightly heavier and DSG only.
I did notice that the HID lights on the Audi were definitely better than the mk6 Golf-GTI HID lights. The cut off was slightly sharper and more defined. It's not a big deal and light output seemed the same. The Golf did have cornering lights which is a bonus.
I did notice that the HID lights on the Audi were definitely better than the mk6 Golf-GTI HID lights. The cut off was slightly sharper and more defined. It's not a big deal and light output seemed the same. The Golf did have cornering lights which is a bonus.