I've had many GMPP, Borla and Corsa exhausts and they'll all sound great on the GM V8 engines. GMPP/Borla touring has a nice almost factory growl and tone. Reminds me of my 09 before GM killed their factory exhaust sound, but a little louder. No drone. The louder Borla systems sound good, but they get raspy the more aggressive you go (S Type, Atak). Never been a fan of those.
Corsa touring isn't available on the newer 6.2, but the Sport sounds great. Corsa has the best drone elimination at the cost of some lower frequencies, so it has more of a "race car" sound to it. If you like reving under bridges and tunnels, this is the one to get. Hah.
Not to say GMPP/Borla drones, but some folks may interpret the lower exhaust note as drone, such as during low speed slower acceleration. It's not actually drone as I would define it. Just exhaust, but you can hear it. That's what you want, afterall. Actual drone is far more pronounced and annoying. Either way, you won't hear much cruising on the highway.
And the GMPP is basically a Borla Touring system, I could never really hear a difference in sound, if there was one.
As usual, they all sound great, and comes down to personal preference. Do you want something louder than stock but won't break local sound ordinances, no drone, go GMPP or Borla touring. Want a more aggressive sound, yet reasonable volumes, and still no drone, Corsa Sport (or touring if you have the option, it's a bit quieter, and less aggressive).
And no video will do then justice.