Hello,
supposing I upgrade my env from 4.3 to 4.4.
Then I can update my clusters' compatibility from 4.3 to 4.5.

I can do it in two ways:

1) select cluster line, "edit" button and change "Compatibility Version" from 4.3 to 4.5
2) select cluster line, "upgrade" button

correct?

What is the difference?

Thanks,
Gianluca