I have run Corsa for a few months now. I can see where dark side is coming from, it can sound kinda raspy, but I think that is inherent with a V6. It is tough to make every aspect of that exhaust sound good. When starting from cold, it sounds kinda loud, as it warms up a little, it sounds quieter. I do not know how it sounds going down the strip, as I am always in the car, and there are louder cars there. But on the freeway, I do not notice anything obnoxious about the sound.
The reason I chose Corsa was because there is absolutely no drone. That was important to me. But I will say my wife does like the sound it puts out, compared to my 96 impala, or 454ss truck that had full exhaust from headers to tailpipes. I would chose it again. Hope that helps. I should have videos posted here through YouTube.