Hi. I really didn't notice much of a breathing difference between the Cis scrubber in either machine (Cis, or Meg). Again, I wasn't truly focused on feeling the changes from scrubber to scrubber as both seemed fine and easy. If there were some notable resistance in OTS Cl machines they were felt in the corrugation of the hoses, and in the use of thicker, or thinner flapper valves. However, now that you have me thinking about it I will have to try to get a hold of a pal's Cis scrubber for a future test. Cheers.