After driving it for the last day or 2, I have to add to my findings...
The sound is super raw! There IS drone, and this exhaust is a lot louder than I expected. Under WOT it's like a NASCAR. During the initial start on a cold start-up it sounds like you're awakening a beast; but it quiets down soon after! I will definitely be swapping off my Sport muffler for the Touring Muffler. I do not recommend running Long Tubes with the Corsa Sport Exhaust; it's just too loud for daily driving.
I have heard/read the same thing about this combo. On the bright side-you should be able to sell that Sport muffler awfully quick