Good luck making an educated purchasing decision based on DiMarzio’s DCR specifications. Thankfully they provide really good and reliable product information. Seymour Duncan should take notice.
I agree with Duncans. In the timeline they change some specs or re-calibrate, i'm not sure what it is but the values may change. The real problem is inconsistancy. I have seen many DCR values in a huge range, especially overwound humbuckers like JB. On the other hand i have seen Dimarzios from 80s, 90s or 2000s and specs are in a much narrower range and totally understandable.