I notice
- https://abj.miraheze.org/wiki/Special:ManageWiki/permissions/user
- https://radioscanningtw.miraheze.org/wiki/Special:ManageWiki/permissions/user
differ by the latter missing
- wpgroup-matrix[]=wgAddGroups-automoderated
- wpgroup-matrix[]=wgRemoveGroups-automoderated
- wpgroup-matrix[]=wgAddGroups-moderator
- wpgroup-matrix[]=wgRemoveGroups-moderator
(Maybe related to my experience of restoring initial state from T4895.)
Anyway even though no items are checked, there are more items on that page on one wiki than the other.