Who taught me to distinguish between melody metal and dark metal in black gold, and then distinguish between black gold, death and bad luck?

What is dark black metal ~ ~ I haven't heard this classification, but I know melody metal and original black metal. . . Melody black metal generally has a keyboard player to set off the atmosphere, and sometimes a female voice is added. The improvisation part of the guitar is more beautiful than the original black metal, but in the original black metal, most of you can only hear the lead singer, bass, guitar and drums. RIFF is fast and evil, but their singing skills are not much different. Black gold, death and bad luck are also very easy to distinguish. Death metal is characterized by violence, and the singing method is generally dead sound, that is, roaring, animal roaring and the like ~ ~ guitar arrangement is obviously different. I don't listen to many unlucky people, but the rhythm of bad luck is very slow, and the arrangement is generally dark. . . . All of the above are personal opinions, lightly spray. Please listen to LZ more if you want to distinguish.