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I’m fairly certain that there are only two differences between the 9300 and the 9700: 1. The 9700 includes additional brush heads included in the box. 2. The 9700 includes a premium case that features the ability to charge your toothbrush using a USB cable plugged into the case (useful if you're a frequent traveler, I suppose). The toothbrush itself is identical (9300 vs. 9500 vs. 9700).
Model Differences: 9700: Special "Lunar Blue" color. 5 cleaning modes. Comes with 6 heads. Travel case has a built in USB cord. 9500: Same as 9700 except: Comes in 4 color choices, but not the "Lunar Blue". Comes with 4 heads rather than 6. 9300: Same as 9500 except: 4 cleaning modes rather than 5 - skips "Tongue Care" mode (does anyone really want this?). Comes with 3 heads rather than 4 (skips special tongue cleaning head). Travel case has a separate USB cord rather than one built into case. So really the difference comes down to: the 9300 doesn't have special tongue cleaning mode & brush head, and its travel case lacks a built-in cord. These features don't add much value for me, so I would opt for the 9300.
$111 bucks & bluetooth.
The difference is the USB charging travel case
The design and appearance of the DiamondClean smart series do not depart from the normal design which we have seen with the early DiamondClean toothbrushes. However, there are elements which have been added to the smart series. The original DiamondClean toothbrushes were famous for its one button which served as the power button. However, with the smart series, the toothbrushes takes on a more sophisticated look by the inclusion of not one, but two buttons which make it fundamentally different. The two buttons are obviously not for fancy as one of those buttons continues to serve as the power button. However, the function of the second button is quite different. This button is used to manage the intensity when the toothbrush is in use. Furthermore, there are a bunch of LEDs signals just beneath the two functional buttons which represents the modes of cleaning which are available to its user
The only difference is, there is one more mode. (Tongue clean)
Does the 9300 have Bluetooth capability? If not, that’s the only difference I would note!