Hot answers tagged content
This is very much an "it depends" kind of question; as posed there's no single "correct" answer. Is the lengthy article something that users are likely to read continuously, from beginning to end? If so, intra-article navigation may not be necessary at all, and if included should be backgrounded rather than made persistently available so it doesn't ...
Users might get confused that the same UI pattern is used for two different reasons. For the pages example, it's perfectly reasonable to break out that content over many tabs (as you did). For the filter example, I would recommend using another method to display the active filters. Here are two examples:
Only top voted, non community-wiki answers of a minimum length are eligible