I have the muffler version...I really only bought it because I got an outstanding deal on it used, but it's become one of my favorite mods so far.
I don't think it sounds a whole lot different than Xxyion's video. Then again, I've never heard it from outside the car other than at idle. From inside I'd say it's more than just a little louder than stock but not obnoxiously so. It
is pretty damn loud at cold start.
.