With these papers you can make some interesting B&W prints, though I've not printed a lot of monochrome with this paper. I'll speculate and suggest the Epson paper is the same as RR & BC. That being said I print B&W as a RGB file where R=G=B and use a color ICC profile provided by RR or BC using Light Room. I'm using an Epson 3800 running OEM K3 pigmented inks. I find that I have to fudge the print brightness output about -5 in the LR Print module to get appropriate densities or brightness of tones. I'm certain the paper contains optical or fluorescent brighteners of one sort or another. I would also like to see prints made with this class of papers using dye based inks to see if it can begin to match the original Kodak Metallic chemical based emulsions. If that could be accomplished with ink and paper I think more people would flock to the paper, particularly fine art types.
Experimentation will probably be your best bet. Creating my own profiles haven't been as successful as using canned ICCs from the manufacturer's site.
Whether the prints work for you are not will depend upon your tastes and goals. Generally I found my most satisfying results have been with color images rather than B&W. Of course your mileage will vary.
Don Bryant