There is a difference. EORA means late onset of RA, after 65, YORA usually found between 30-60. There seems to be many different aspects of treatment and disease progression that should be considered and evaluated when choosing a therapy route.. On this forum I have not seen this distinction being made. It would be interesting to know what catagory forum members belong to. Having followed the forum for 2,5 years I have a feeling that most of us belong to the YORA group?
Here is one link to give more understanding on the differences.