What is the difference between UHS I and UHS II?

Related questions

1. What is UHS SD card?
2. What is XQD format?
3. What are the differences in SD cards?
4. What is UHS II?
5. Does Nikon d750 support UHS II?
6. What is UHS 1 Class 10 memory card?
7. What is the best memory card for Nikon d500?
8. What is UHS speed class?
9. Is UHS II backwards compatible?
10. Does Nikon d500 support UHS II?

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