The second head is smaller in size and specifically meant for more compact precision cleaning. On the other hand the Braun Oral B Professional Care Oral Care System comes with five different toothbrush heads. The first toothbrush head is a flex soft head, ideal for sensitive teeth and gums. The second head is a power polisher as its qualities suggest. The third one is the dual action head; fourth head is a tongue refresher and the fifth head is an interdental cleaner.