I have heard that the PRO unfortunately works better
ha ha but it would not be as distinctly unusual smelling ha ha
Have you thought about a Carbon Filter or even a Carbon Scrubber in the box ?
It really would solve all your problems in one swoop, it might cost more than the ONA but you will have far far less to worry about in the long run and it would be so much more effective at actually removing the smell and there would be no other smell in its place
I have heard that if ONA comes into contact with your buds it will effectively neutralise their taste and smell which nobody wants but if you are careful all should be good.
Hope this helped somewhat