Here are the key differences between the Severin EZ 7406 and the Severin EZ 7405:

- Number of Bowls: The EZ 7406 comes with 2 ice cream containers, allowing for the preparation of different flavors one after the other, whereas the EZ 7405 has only 1 bowl.
- Additional Features: The EZ 7406 includes an additional ice cream container in the accessory set, which is not mentioned for the EZ 7405. This feature allows for more versatility in making different flavors sequentially.
- Dimensions and Weight: While both models have similar dimensions and weights, the EZ 7406 might have slightly different packaging dimensions due to the inclusion of the extra container. However, the main product dimensions are largely the same (22.5 x 43 x 29 cm for both).
- Other Specifications: Both models share many similarities, such as the 2L capacity, 180W power, active cooling by compressor, and the ability to make ice cream, sorbet, frozen yogurt, and yogurt in under 30 minutes. The main differences are primarily in the number of containers and the associated versatility.

In summary, the primary difference is the inclusion of an additional ice cream container with the EZ 7406, which enhances its functionality for making multiple flavors consecutively.