Facelifted has different headlights, front indicator, side indicator front fender, hood and tailights. Facelifted starts from year 2002. Not too sure about special edition but m-sport has mtec bodykit, round steering, sports seats, larger sport rims and mtec springs; probably have more features that I don't know of. SMG is bmw sequential manual gearbox. It is a manual gearbox without the need for the driver to engage the clutch. It has an actuator that engages the clutch. All the driver needs to do is to change the gear using the lever on the steering.