Board Thread:General Discussion/@comment-24643203-20140408002030/@comment-366087-20140408062721

Sysops *are* Admins. The term is interchangeable. So you may wish to define exactly what you are thinking about the two.

If you are seeking to change the label for ALL members of a group, you can do that at MediaWiki:User-identity-box-group-chatmoderator, MediaWiki:User-identity-box-group-founder (you), MediaWiki:User-identity-box-group-sysop (admins), and even MediaWiki:User-identity-box-group-blocked without having to dive into CSS and jscripts.