The difference between the iO 6 and the iO 6 + Sensitive lies mainly in the target group and the specific needs they cover. Both models offer similar functions such as five cleaning modes and a pressure sensor. However, the iO 6 + Sensitive might be specifically designed for sensitive teeth and gums, while the standard iO 6 covers a wider range of needs. The exact colour of the iO 6 + Sensitive is Grey Opal.

The main differences are:
- Target group: the iO 6 + Sensitive may have been specifically designed for sensitive teeth and gums.
- Colour: The iO 6 + Sensitive is available in Grey Opal.
- Functions: Both models offer similar functions such as pressure sensor and different cleaning modes.