So, I know the Touring and Touring GT have the same engine. However, here's something puzzling. My wife and I test drove both cars (new), each with between 3 and 10 miles on the OD. The Touring engine was rough and loud at cold start up and while driving. The GT purred. Then, we cold started up three other Tourings on the lot ... all were still rough and loud. We also cold started two other GTs and they purred like the first one. I don't know how to explain this. Any thoughts?