What is the difference between the Grillo Chef 2 and the Grillo Chef 40?

As of 2021, the diameter of the BBQ has been added to the product name of the barbecue and its accessories. For example, the product name Grillo Chef 2 has been changed to Grillo Chef 40 and can be used with the accessories from the 40 series. There’s no technical differences, it is only the product name that changed.
You can also read more information in this blog: CADAC Gas barbecues: an overview!