I have the touring and I love it. It's quiet until you want it to be loud. You can cruise and it's quiet. Cold starts are a different thing. I live in an apartment and I can imagine my neighbors aren't big fans.
Both the Sport and Touring sound great with the factory manifolds and cats. I do agree with the comment regarding installing the Touring kit if you plan to install long tubes in the future.
I found that the sport has toned down some over the last month or so. Definitely not loud in the cabin and no drone. I'm glad it has gotten more quite though. I'm about to put some headers on