Street Glide or Road king

Tach people, I would like to buy my first Harley in the foreseeable future. Saved a long time on it. And it should be a Street Glide or a Road King. Can’t decide me right yet. Now my questions: Which of the two machines is better? I’m not a heater and often ride longer tours. And what top speed does the two bring, however, so that the speeds are still in an acceptable range? And can you make the Twin Cam engine legally louder ( Aus puff) ? Is the Twin Cam engine reliable and suitable for everyday use? Thank you for your answers. See you on the Road! Greetings Terence (the 24 lenze no longer vote)