Is it worth buying a pricey electric toothbrush?

I’ve seen models for almost £300, but I’m not sure if
they’re a lot better than the basic ones

Every week a Guardian Money reader submits a question,
and it’s up to you to help him or her out – a selection of the
best answers will appear in next Saturday’s paper.

I’ve seen electric toothbrushes in Boots and there’s a huge
price difference. There are Philips ones for £299, Oral-Bs for
£140, but other Oral-Bs for £35, and a Colgate for £18. I need
to know what’s the difference between all the models particularly
as they all look much the same?

Source: FS – All-News2-Economy
Is it worth buying a pricey electric toothbrush?