What is the difference between thrash metal and speed metal?

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Tags

1. #pitched
2. #utilize
3. #vocals
4. #metal
5. #sound
6. #higher
7. #clean
8. #bands
9. #vocalists
10. #speed
11. #heavy
12. #hardcore
13. #traditional
14. #sounds
15. #often
16. #influenced
17. #grittier
18. #simply
19. #whereas
20. #thrash
21. #denser
22. #harsher