It sounds like you are inclined to believe that this is the proper interpretation: ".. B is more effective in the inhibition of the coronavirus relative to an equal amount of R"
"(10 uM keeps coming in mind)" I don't know if these things address that:
Both of those deal with VERO cell tests. The statement that I'm trying to understand uses human lung cells for B and VERO for R.
I get the sense that even if I could get clarity on the meaning of concentration that there isn't any consistency at all in the way the numbers are presented. Comparing Vero results to human lung cell results is comparing apples to oranges however the concentrations are measured, isn't it?
Have you seen the results of R testing in human cell lines and how THEY stacked up against the B results? Isn't that the appropriate question?