Sonic Toothbrush Uk Is Any Difference Between This Electric Toothbrush And A Sonic One?

Is any difference between this electric toothbrush and a sonic one? - sonic toothbrush uk

Hello .. Today, my dentist told me to buy a sonic toothbrush .. Nevertheless, I was in Argos and I was thinking about buying, but it is .. Sonic so .. Would it be good or what is the difference between him and brushing teeth Sonic?
http://www.argos.co.uk/static/Product/partNumber/4431424.htm

Thank you very much