Black Metal Vs Death Metal?

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So, we have heard about this two genres always, here there, but whats their difference? which one you prefer? whats your favourite death/black band? The death have a lot of distortion guitar and overall big bass, double drums, but the most important characteristic is their singing, deep growling Vocals, there are awesome groups of death metal like "death", "amon amarth", "kalmah". Tell me what you think about black meta??