If pressed I will say that I have felt that I've seen some level of what I guess you might micro banding on my 3880 – something I don't see with my Z3200 (which I have spent some time with making negs). I don't see the "micro banding" in either printer on paper positives.
The negs on the P800 seem better than the 3880 to me so far but I am using different profiles.