mini rant because re
"blackened" genres have nothing to do with their styles, it has to do with their subject matter. i get irritable when people dont get this.
echo if you cant tell the difference between types of screams thats fine, but dont try to pretend you do because people WILL call it out
It
can be musical influences, especially if they're influenced by black metal. You get that with a lot of death metal bands that have some black metal instrumentation too.
Belphegor does that from time to time.
Ultimately though, I think genres in reality are more like inch high walls in metal, anyways. Things are quite loosey goosey. Especially sometimes it feels like splitting hairs.
For example, black metal uses tremolo picked riffs, so does death metal, black metal uses blast beats, so does death metal, black metal uses complex song structures, and so does death metal, in fact there's an entire genre defined by its technicality.
It just depends how you look at things.