Never heard of those actually. In my opinion Death Metal is almost like modern day classical music... usually because it is so heavily orchestrated. I tend to lean more towards the melodic metal. There is some dirty stuff out there that i have yet to develop the ear for.
That's funny because Strapping Young Lad is one of the few heavy industrial metal bands out there with some real melodies in their songs.
Never mind the weird music video but this song is one out of many that I like: