As far as I understand only the 91A1A-B24-T13 is a reverse log pot.
According to Bourns datasheets you need a "T" in the last group of the part number for it to be reverse log. The others, like the "D20", are just regular audio pots. I have ordered two of the 90B4116 (91A1A-B24-T13) parts and measured it out to make sure it is reverse log.
After looking at the data sheet, I'm not sure these are actually rlog pots. The part # Tamas gave us is listed as a CW Audio pot. Aren't rlog pots CCW pots?