Swen specifically said there is more content in BG3 EA than in Dos2 game but that is CONTENT overall that is not linear story progression. To see all the content you have to play the game multiple times doing different things.
As to the title there is more EA content to come. In the panel from hell video Swen specifically said there would be more classes added to early access, more companions, more races and more features to be added to EA.
This is not the entirety of the EA, you can't play EA in one go to see all the content because content is gated based on your choices, and some dialogue choices are very "edge case" so unless you do very odd things you'd never know the game would acknowledge your choices but they are in the game. What are they? I have no idea.
[Sources]
That there is more content for EA to be added
https://youtu.be/qboLvZ5YQSg?t=4907Where he says EA is bigger than Dos2
https://youtu.be/yecUvbMnkhM?t=18