I think the information presented on the moderator voting page is not really sufficient to make an informed decision. Moderators are not really just good SO users but are active SO citizens who help SO. This has a lot more to do with editing and commenting and less on the quality/quantity of their questions/answers.
Unfortunately, information on edits/comments is not available. It would be nice if this information could be made available in relation to moderator voting (i.e., links to specific edits and comments).