I test drive the older A4 model before and it was a heavy car. The accelleration was not as good as the new A3. I saw the new A4 in person and it is a much nicer car.
If you care for the driving experience, the A3 is your better bet. If you care for the space etc. go with A4.
If you care for the driving experience, the A3 is your better bet. If you care for the space etc. go with A4.