What is the difference between Priority Mail and Priority Mail Express?

Related questions

1. How does Priority Mail work?
2. How is priority mail delivered?
3. Does USPS deliver priority mail on Sundays?
4. Is it cheaper to use priority mail boxes?
5. What's the difference between Priority Mail and Priority Mail Express?
6. Does Priority Mail move on Sunday?
7. Does USPS deliver after 5pm?
8. Do you have to sign for USPS Priority mail?
9. Is it cheaper to use your own box for priority mail?
10. Is USPS first class or priority mail faster?

Tags

1. #envelope
2. #service
3. #shipment
4. #shipments
5. #fastest
6. #formerly
7. #distance
8. #express
9. #based
10. #domestic
11. #limited
12. #weight
13. #travel
14. #rates
15. #priority
16. #business
17. #shipping
18. #known
19. #commitment
20. #options
21. #depending