I don't think the ratings can be compared. OTB and CC is as different as [cencored] and [cencored].
For the start, RHP is a faily small community compared with the FIDE and USCF, meaning that there might very well be a inflation, or deflation, of ratings, without we even know it.
Secondly we have differnet way of looking at the board. A two dimensional vs a real board gies different advantages for either case.
Thirdly we have opening books available when playing, that OTB cannot have, we can thing whenever we want, not when my opponent want. I can play slowly, or fast, at my chosing.
So I think that the ratings cannot be compared.