I am not certain.
IIRC, I read a post at AVS that said that the line level output of the Digital RS meter did not apply the weighting, thus you would not want to use RommEQ Wizard with the C Weighting compensation. But I can not confirm that. It is accepted that the Analog meter's line out DOES apply the C Weighting.
The post where I read this may have been part of a huge thread relating to ETF software, but I would not guaranty that.
The uncertainty surrounding the various RS Meter correction factors is the main reason I opted for the Behringer mic and mixer/pre-amp. It is said to be dead nuts flat from 20 hertz well into the midrange, which is precisely what I want to measure.
Brian