I've figured it out!
I highlighted the albums in OrangeCD that have "Brian Eno" tagged as the artist.
Right-clicked and selected ARTIST PROFILE.
Sure enough - the PRIMARY NAME field read, "Brian Eno - Unfamiliar Wind (Leeks Hills) (1978-1982)" while the SORT NAME field simply read, "Brian Eno."
I closed that window and clicked LIBRARY - MANAGE ARTISTS, located the entry and clicked RENAME. I then corrected the PRIMARY NAME and re-synced the profile.
Within minutes RacksandTags updated to reflect the change!