I am sure you won't be confused LOL. Equalizing for comparison purposes is fine, but I don't want others to the think that somehow a 500 cfm 2 BBL won't actually do 500 cfm.
I think what people should realize the engine will pretty much pull the cfms needed with almost any carb of course there be problems at the extremes. Bigger carbs don't make an engine consume more air and fuel than the engines requires it's just if you go too big an engine loss too much velocity and vacuum to function properly and too small is just throwing away power.