There is a very large difference between a 10k user and a diamond moderator in the available moderator abilities. The FAQ is a bit misleading in that regard.
From a post on Meta.SOFrom a post on Meta.SO
Diamond moderators are human exception handlers. The main function of diamond moderators is to follow up on flagged posts but they also have some special abilities necessary to handle rare exceptional conditions:
- They have access to all the abilities of 10k users regardless of their reputation.
- Their votes are binding. Any place we have voting — close, open, delete, undelete, offensive, migration, etc — that vote will reach the threshold and take effect immediately if a single diamond moderator casts a vote.
- They can locklock posts. Locked posts cannot be voted on, commented, or changed in any way.
- They can protectprotect questions. Protected questions only allow answers by users with more than 10 reputation.
- They can see more data in the system, including vote statistics (but not ‘who voted for this post’) and user profile information.
- They can view all deleted posts on an individual user's profile.
- They can place users in timed suspension, and delete users if necessary.
- They can perform large-scale maintenance actions such as merging questions and tags, tag synonym approvals, unbounded question migration, and so forth.
- They can convert a post into Community Wiki status, or convert an answer into a comment.