Beneath the horizontal line are:
Not much to say with respect to Marian's and Robert's work that was not already stated in the comparison of Marian's and Robert's work. Just beautiful artistic work.
The photograph, however, shows considerably more feather detail than any of the prints, especially on the breast and facial mask.
When compared to Robert's work, there is considerably more brown around the eyes of Marian's owls and the owl in Jack's photograph. One could likely see such differences among individuals in the wild as well.