Addition, concerning groups, and I am now talking from the data Discourse is working with (so data that was already transferred from FAS to Discourse; I retrieve it from Discourse): sdgathman [1] differs from rlengland [2] only in the following ways:
[1] is in “packager”, [2] is not.
[2] is in “magazine-editors”, [1] is not.
[2] is TL3, [1] is not.
[1] is in fedora-contributor, [2] is not (!).