I have not worked with the devices you point out. However, from what I have read, the lower cost < USD50 CO2 devices use a CO2 estimating sensor that ‘experts’ say is less accurate. I am far from an expert, but I wanted to get a good feel for air exchange in these covid times. So I girded my credit card and got the Aranet4 device based on the reviews. It is Bluetooth not zigbee. I kind of like that fact that I can take it out of the house and see CO2 levels at other places. If you are interested in the ‘state’ accurate CO2 level monitoring and want to waste several hours, google ‘CO2 monitor COVID’ 
. After I purchased the Aranet4 unit, I ran across this other device that in addition to CO2 and the standard other sensors monitor Radion as well, if that is an interest. I am happy with the Aranet4 device after using for about 2 month, I have used a Eve Room for about 5 years, prior to adding the Aranet4, it only does particulates. But like Aranet, they seem to have done there homework. Links to both devices below. Good hunting, hope you find something of use :
I’m not quite clear on which Airthings device to buy to get ‘all’ the reading, a bit confusing.