Seems like ISO 3098 is significantly newer than DIN 6776, so it's the ISO standa...

app4soft · on Feb 24, 2020

Well, you are partially right, because most of "DIN" standards already replaced by "ISO".

But there are still many "DIN" standards that now replaced by "DIN EN ISO", e.g. German (local) version of «ISO 3098» (which replace «DIN 6776») is «DIN EN ISO 3098».[0]

[0] en.wikipedia.org/wiki/List_of_DIN_standards#DIN_6000_to_DIN_6999