Everything is better in D:OS 2 including the smooth gameplay, presentation, graphics and moral choices. But the only positive in D:OS 1 is the story... everything else is bad.
Is DOS as good as DoS2?
Even though DOS 2 does do a couple of things better than DOS 1, in almost every case, DOS 2 does, many, many, many more things way worse than DOS 1. On the whole, DOS 1 is a vastly better game than DOS 2.
Can I play Divinity 2 alone?
You can definitely play it solo.
How many hours is DoS2?
10 The Game Takes 100 Hours To Complete The creators of Divinity: Original Sin 2 have packed this sequel with all sorts of surprises, and completing the main story in its entirety will take gamers around 60 hours. However, if a player chooses to take on extra quests, this time can be extended to 80 hours.