I've rarely seen a better case argued for using your ears rather than all this reductio ad absurdum.
If you like the sound, buy it.
If you don't like the sound, buy something else.
If you want to score points, endlessly, boringly, repetitively, then analyse the sound to death using oh-so-clever graphs accompanied by casual put-downs ("I suspect not everyone will know how to read this ...").
Perhaps clutching a copy of this graph will somehow make your PA sound better in The Tickled Trout.
I promise you it won't make a blind bit of difference in any pub I've ever played.
I imagine that the RCFs sound great. I know the Barefaced RFs sound great. Lots of things sound great.
Get over it.