I’ve had different dental workers recommend one, the other or “either, they’re all fine” at different times. They all universally recommend using an electric toothbruch if possible. I used to have a sonicare for years but when the rubber around the button eventually disintegrated to the point where it stopped working, I switched to Oral B because the brush heads are smaller and cheaper. Definitely look at the cost of refills when thinking about the price. They all use an inkjet printer/ razor blade cartridge price model. And when you get something, don’t put it in a sunny window with the rubber covered buttons facing out, that is the 1st point of failure and UV rays seem to accelerate the damage.