The Differences between Importing and Creating a History

[Salvoyard]

So, now that we've had a few days to evaluate the game, can anyone tell me what exactly the differences between Importing and using a Created History are?

I know that the relationship between the Watcher and Iovara is only mentioned if you import a save from Poe I, but does anybody know about any other? And, is it worth it to replay PoE (from scratch) to make those choices?

Thank you.