I've had this car for about 6 months now, and it is a very reliable, responsive and fun car to drive. The metallic red turns heads, the interior is well done, and gas mileage has averaged 27 combined with the 2.3 .
The 6 disc CD changer The Sport AT.
Interior - a dead pedal, optional upgrade to the Bose speakers, turning the shift number light off when in the automatic mode of the Sport AT, more sound deadener, and thicker carpeting. Different leather colors. Exterior - nothing. Mazda got it right the first time.