Question about Philips Sonicare Sonicare DiamondClean

Basically, you can say that the DiamondClean 9000 replaces the "old" DiamondClean and is the new model. Here are the main differences:
- The DiamondClean has 5 cleaning modes (clean, white, deep clean, gum health & sensitive) compared to the 4 modes of the DiamondClean 9000 (clean, white+, gum health & deep clean+).
- The DiamondClean 9000 has 3 brushing intentistes (low, medium and high) which are not available on the original DiamondClean.
- The DiamondClean 9000 has additional buttons and icons on the handle.
- The DiamondClean 9000 has Bluetooth connectivity.
- The DiamondClean 9000 has BrushSync technology.
- The DiamondClean 9000 has a pressure sensor.
- The DiamondClean 9000 has a USB cable integrated in the housing instead of a detachable cable.
- The DiamondClean is available in 4 colours (black, white, rose gold and rose gold) compared to the 2 colours (black and rose) of the DiamondClean 9000.
- The DiamondClean 9000 has a retail price of around 190 compared to the DiamondClean's around 140.