I realize your question was directed at the OP, but I have checked some paper negative / paper positive contacts made this way. The level of detail in the prints is almost as good as the negatives, but there is a slight 'texture' effect on the prints coming from the RC paper negative. I can see the texture clearly only under magnification, and it's not very strong. A fiber based paper negative would, I think, give a lot more texture.
Back to the original paper negative, the level of detail I see is almost as good as the level of detail in negatives made on ortho-litho film, which can record about as much detail as micro film. This is probably due to limitations in my lenses, which are all old and not of modern design. But I think a neg made on RC paper can hold much finer detail than can be seen on a contact print at a normal viewing distance.