I've tried on the raw black and raw indigo a few times and found the same thing. I sized one up for the faux noir / black ones. Also note, as I've mentioned several times that sometimes the indigo ones offer a 1-2% stretch which makes a huge comfort difference but the same black pair don't for some reason.
it seems that the 2% stetch options have different measurements when looking at measurements online. This seems to have been the case at least for the PNS where the rise is considerably lower.