What is the difference between an Apple watch 3 and 4?

Related questions

1. Is Series 4 or 3 Apple watch better?
2. Can you text on Apple Watch 3?
3. Is the Apple Watch Series 4 worth it?
4. Can I use an Apple watch without an iPhone?
5. How do I know if my Apple Watch is cellular?
6. Can you swim with an Apple Watch Series 3?
7. Can you swim with Apple Watch?
8. Do Apple watches fit small wrists?
9. How deep can you swim with Apple Watch 3?
10. Does Apple Watch Series 3 have ECG?

Tags

1. #coupled
2. #under
3. #wireless
4. #cellular
5. #called
6. #while
7. #watch
8. #series
9. #model
10. #connectivity
11. #hardware
12. #processor
13. #apple
14. #memory