The main difference between the "Cosori Dual Blaze XXL 6.4 l, 1700 W" hot air fryer and the "Cosori Dual Blaze Pro" can be summed up as follows:

- Capacity:
- The Dual Blaze XXL model has a capacity of 6.4 litres, while the Dual Blaze Pro generally has a capacity of 5.5 litres.

- Power:
- Both models have a power output of 1700 watts, but power distribution and heating performance may vary slightly.

- Features:
- The Dual Blaze XXL is equipped with Dual Blaze technology that offers dual air circulation for more even cooking, while the Dual Blaze Pro could have similar features but with minor adjustments.

- Design and Screen:
- The Dual Blaze XXL has a touchscreen and non-stick coating, features that could be different or less advanced in the Pro model.

- Price:
- The price of the Dual Blaze XXL is generally higher due to its larger capacity and advanced features.

These differences reflect the improvements and design choices specific to each model.