Hi, Dan
I did a spring shake down run out to the Markham Airport. This is really subjective, too many changes to the car since last fall, but the muffler seems to have a deeper richer sound at idle, it does not seem to be any louder at speed in the car. I will confirm this later in the week, I took some sound measurements last fall but this will not be a true A - B test as there were other changes that would effect the interior sound. For the video, camera was held approximately to the SAE Sound Test Spec 0.5 meter back from a muffler tip, 45 degree offset and at the height of the tip. Hope this helps with your decision.
Video did not upload, I will try again