I had my first KB breba yesterday. If I rate VdB breba as 5, I would give KB 7. It wasn't fully ripe as Herman's, but it's been raining, and there was spitting around the eye. The taste was more intense than VdB, however, I can't tell exactly what it tasted like. It was definitely sweet. Two more will be ready in few day for another tasting. I might be able to give better report at that time.
The breba looked very much like Herman's.