I feel like they doesn't get enough attention. sad
This is Hagune Miku:
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She's the heavy metal Version of Miku. Many only know her song "Sweet so Sweet" which in my opinion... isn't her best. -_-;
Here are her best songs:
Rain Stain (I know it says Hatsune Miku, but the picture is clearly Hagane.)
Diving
Miku You, Fxxk You
Shake Your Head
This is Zatsune Miku:
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(the following vids say Hatsune Miku, but it's actually Zatsune Because of the fact its rock, no pop.)
BE MY SACRIFICE
Despair

LASTLY!
I know this has nothing to do with Zatsune Miku or Hagane Miku but.... do you know who is singing this song?^^;