They are defiantly related Dan. Site A is for Primary Care Physicians. Site B is for Clinical Geriatrics which is a part of the whole Primary Care Market. Family doctors are always interested in the elderly.
I just need to know what will happen to site B and its Domain Authority if I change the domain name and then add a bunch more content (about 2,000 urls). With the Change will I lose much of my 58 DA?
Thanks,
Jeff