No. it's not the same. First of all, not all the media with one code comes from the same machine. There are "good" machines and "bad" machines. Do the company mix all of them and send them randomly? Of course not, that's not the spirit of capitalism.
Also.. another example is the re-labeled media. Company A (like ritek) ships an amount of discs to a company B, like Fuji, Verbatim, Sony or whatever. If company B doesn't like it and reject it, what happens to the disc? Will company A destroy all of them to control their reputation? Well.. some does so.. but many of them just re-print the surface of the disc and sells it. There are many more things to consider other than media code.
Having said all of these, I don't mean to blame Fuji. In fact, I expect their ricohjpnr01 is better than the other brands of ricohjpnr01s because of the above reasons.