Actually my first VW was a 78 Rabbit Diesel. It had 7 inch round headlights (remember those days?). I put Bosch H4 lamps into it shortly after I got it. I remember the low beams had a sharp cutoff, but the highbeams did not.
Even my 92 and 97 Jettas (which also had combined high and low) didn't have a sharp cutoff on the high beam.
Overall I loved driving the A4 Jettas I had, but the headlights were definitely compromised.