From a systems standpoint the writing is better. Deadfire has the most dialogue checks of any game in history.
The worldbuilding is also better. They went from a fairly generic FR inspired setting, to a whimsical colonial Polynesian inspired setting.
That's not a given. I prefere a classic setting like Poe1, with gothic castles and proper dungeons, i can't care less about pirates or fucking tribal zulù amokabonga bonobo villages
classic setting like Baldur's Gate, Poe 1, Pathfinder Kingmaker, Divinity original Sin, King bounty, Heroes might and magic, Age of wonders 3 and many others. You can't go wrong with classic, people will always like it.