According to the specifications of an optimal toothbrush from my dental hygienist, the brush head corresponds exactly to the old Vibra toothbrush, right in the photo. According to this, a Vibra toothbrush should have a raised section in the middle so that the interdental spaces can also be reached.
I must add that I suffer from paradonditis, a disease of the gums. With this disease, it is particularly important to brush your teeth properly, as the diseased gums continue to recede until the healthy teeth eventually fall out if the correct countermeasures are not taken. In addition to cleaning the teeth with the Vibra toothbrush, the interdental spaces should be cleaned individually with small round brushes to get rid of all food debris so that the gums do not become inflamed.
Photo link of the old and new toothbrush from Candida below
https://community.migros.ch/m/media/gallerypage/user-id/142368/image-id/11236iE21005746A6163F2