The first heading should come as far up as possible in DOM on **both new and old Vector.**
Indicators as shown [[ https://en.wikipedia.org/wiki/First_Battle_of_Dernancourt | here (barnstar) ]], [[ https://commons.wikimedia.org/wiki/File:Parque_estatal_Chugach,_Alaska,_Estados_Unidos,_2017-08-22,_DD_94.jpg | here (combination of badges on Commons) ]] or [[ https://en.wikipedia.org/w/index.php?title=Front_(disambiguation)&action=history | here (helplink) ]] should come after firstHeading as it's more descriptive and clearer to, for example a user of screenreader software.
One minor possible side-effect could be that excerpts of Wikipedia articles in search engine results would include the indicators in the excerpt in the sequence:
1. first heading
2. indicators “This is a featured article”
3. prebodyhtml
4. siteSub
instead of
1. first heading
2. prebodyhtml
3. siteSub
= QA
Test page
[] The indicators appear below the title on **legacy Vector**
[] The indicators appear below the title on **modern Vector**