I bought mine CPO, so I'm not sure if the previous owner swapped panels though when I looked at it it looked stock. I mention that because if the windows are down and radio off, I can hear the turbo spool a bit as well as the diverter valve between shifts which to me seemed uncommon for a stock vehicle. However, I've never owned a performance oriented turbo charged vehicle just a people hauler.
That's really the only sound I'm looking for tbh. In my Passat I had a high flow intake, relocated the DV to after the intercooler, and used an MBC to crank the boost from 6.5psi to 12, it made some fun noises.