Good description Flash, although I don't tend to go with the first point that easily, nor with shrieking vocals.
To me the distinctions are:
- Death metal is much more rhythm based. You can easily find death metal songs with grooving riffs, whereas it's virtually impossible in black metal.
"Rhythm based" can be something else as "grooving (groovy isn't it?) riffs". Maybe it's my English but riffs are for me not the drums, while rhythm based can be drums (or included). Death metal uses more bass drums, "drenched" together, and technical bands usually do more variations in time signatures.
And I not sure how to measure grooving (groovy, isn't it?) riffs, but I value the rhythm guitars in black metal very high. It's the most important aspect even. I don't know any black metal record that I like, without holding the guitars in high regard. A vital element.
Perhaps the guitar
work is relatively
simple, but the sound of it has a massive effect. Take Ancient's The Call of the Absu Deep.
I find these guitars sound so cool that I am not bothered by the simple drum work. It fits and it works. Anyway, all these riffs, I find them very groovy and awesome sounding, and the chorus especially rules.
Also note: the vocals are not shrieking. Shrieking is a painful, annoying high sound isn't it? If this is shrieking, I stand corrected. Black metal can have more variation in vocals. With e.g. (normal) speech, whispering.
Not sure if this was stressed but generally speaking, black metal can be more epic and bombastic. Take the use of keyboards. And there's also room for classical instrumentation. Also, black metal can be way more melodic than death metal.