Pump Selection Input

I’m adding another pump. Can anyone offer insight on which the better choice is and why?
Buck Bioaire or Zefon Bio-pump Plus?

Thanks in advance.

Either pump will work. As long as the pump can meter the air in accurately (which both will) is all that matters.

I prefer the Buck…their customer service and annual servicing and annual calibrating of the anemometer is great. I have several of each and if I need another Buck will be the only I go with…