According to our research, the main difference between the Petkit Pura Max and the Petkit Pura Max 2 is some important improvements in the second version. The Pura Max 2 has an improved sealing system that prevents leaks and is particularly suitable for multi-cat households. It also offers improved automatic cleaning and odour control with a new, removable deodoriser. In addition, the safety structure has been optimised to ensure safer use with the new xSecure sensor.