When I first drove my base Roadster, I couldn't really "feel" the difference between standard and performance mode. But after a month or so I could definitely tell. So I've always wondered how much I would "feel" the difference between Base and Sport. Recently I had a brief opportunity to drive a Sport. Doing a 0-60 run, it definitely has more kick at the start. After that initial kick it felt about the same. Makes me think that 0.2 second difference might be all at the start. The car was running with AD07's. My Roadster currently has T1R's. The AD07's definitely have more grip in corners, but they are a lot noisier. My car has the adjustable suspension, and both cars were set up the same, so nothing to compare on that front.