It’s actually an upgraded version of the same engine, and Path of Exile 1 is getting a lot of the new tech backported.
It was originally supposed to replace Path of Exile 1, but now they are going to exist together.
2 will be more refined and slower, with a brand new story and 6 new acts. Should be a fun time.
Slower? I tried to speedrun PoE once and because of a build mistake in Chapter 2 Act 3 it took me 14 hours to beat the base game before maps. Terrible time, but still.
I believe the acts themselves will be longer and more fleshed out but there’s less of them.
6 acts in Path of Exile 2 instead of the 10 acts that PoE1 has.
That might be nice, it would be cool to have coherent independent stories instead of: “There is literally only one path and this random person who means nothing to you or your mission personally is in your way, kill them! (reading their pocket journal is optional)”
I do feel like the second chapter was better than the first in that regard, though.