I installed my Corsa exhaust this past weekend and put together a basic video comparing the sound to the OEM exhaust. Still need to adjust the tips to satisfy my OCD, but otherwise I'm totally happy with it. It uses slip joints, so you can make minor alignment adjustments pretty easily.
From what I've seen there isn't much (if any) difference in weight compared to the OEM unit, but the muffler is MUCH narrower... just a little wider than the reverse light assembly.
I absolutely love the deep throaty sound it has. They're not lying when they say it has ZERO highway drone, either! I drove from Huntsville, AL to Pensacola Beach and barely noticed it on the highway unless I put my foot down hard.