1, fermentation type: type B balsamic vinegar is produced by solid fermentation, while type K balsamic vinegar is produced by liquid fermentation.

2. Brewing method: the brewing method of B type balsamic vinegar is different from that of K type balsamic vinegar. Specifically, B type balsamic vinegar is produced by solid fermentation with bran as the main raw material. And K-type balsamic vinegar is produced by liquid fermentation with rice as the main raw material.