Clean teeth, but how?

The information policy of the manufacturer of electric toothbrushes seem to be guided by the automotive advertising. Much technical information without the hint what these advertised benefits are good.

So I went in the known already in the house and used, but for lack of battery power no longer need to end, Braun Oral-B depend gebliebe.

First advantage: It takes place on the old wall-mounted charging station.
Second advantage is that the existing spare brushes can be used further.
Third advantage: the perceived cleaning performance is higher than before.

And what are the differences, the user benefits of each models are made, I have still not found.