Oral B 3000 Vs 4000 - What's the Difference Between the Oral B Pro 3000 & 4000?

The following comparison guide between the two popular Oral B electric toothbrushes -- the Precision 3000 Vs Precision 4000 - hopes to clarify any confusion or uncertainty you may have with regards to the differences (and similarities) between them in terms of features and aspects. Moreover, it also should be able to help you gain a clear view as to what both models can offer (in terms of health benefits, features etc.) ultimately determining from that...