Strictly in terms of the mic pre itself . . . not counting anything else, I think you'll actually find more acceptance for the RNP amongst professionals and gear snobs.
I'm basing this on what I gather from the guys at Rec.audio.pro. Most of the AE community kind of turns it's collective nose up at anything below the Red as far as the Focusrite line is concerned.
I think a lot of it has to do with the rather simplistic way the Platinum range is designed and layed out -- it's quite obviously taylored towards the prosumer market. A serious AE would likely get a good laugh out of the controls.

It's the kind of thing Fisher Price or AOL might come up with.
From what I gather from the quality of the mic pres, I think they would be considered in the same general class of the transparent variety, as the RNP is. I'm not sure where middleman gets the whole tube thing -- especially considering the fact that it's solid state transformerless. Could be it's "tube blend" button, which again, I assume is considered mostly kind of a novelty feature (perhpaps a toy for the R.A.P. guys).
When you boil it down, you're probably looking at two fairly similar pres in a similar class at reasonably similar price points, with the focusrite having the advantage in terms of the extra goodies it comes with, and the RNP having an advantage in terms of quality for the dollar.