Hotend on ali express what is the difference between v2 and v3

Bambu Lab X Series Troubleshooting
1

hi what is the difference between hotend v2.0 and hotend v3.0 from ali express?

https://www.aliexpress.us/item/3256806987458427.html

https://www.aliexpress.us/item/3256807251345779.html

https://www.aliexpress.us/item/3256807157182235.html

2

Hi

The links seem to be all for v2.0.