The Q&A Admins and Answer Drafters are able to see all submitted questions, as long as they have the permission to the question reference. The difference is that only the Q&A Admin can see the names of the Question Submitters and their role, Answer Drafters are not. The name of a possible Question Drafter is never displayed to the sell side.
The Question Submitters and Question Drafter are able to see all drafted and submitted questions, and the disclosed answers to their buyer group, as long as they have the permission to the question reference. Names of the Q&A Admins or possible Answer Drafters are never displayed to the buy side. The names of the Question Submitters and Question Drafters are shown, unless Disclose to All is enabled.