What is the difference between premium economy and business class?

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Tags

1. #classes
2. #legroom
3. #terms
4. #premium
5. #expensive
6. #these
7. #recline
8. #substantial
9. #offerings
10. #significantly
11. #offering
12. #generally
13. #business
14. #space
15. #greater
16. #headrests
17. #legrests
18. #superior
19. #class
20. #economy
21. #different
22. #amenities