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I agree with Plesen about the atmosphere of the Might and Magic universe in the first part, because in the second part, it's not really felt. But, in the second part, there is a good gameplay atmosphere. For example, I haven't seen such beautiful swamps as in that game. I like the appearance of the second Neverwinter, they didn't cut corners much. As for the dialogues, in the first one, I feel like there aren't enough of them, and in the second one, I haven't played enough to draw conclusions. Although, from what I remember, not much impressed me, and most of them were mainly about the plot or telling about their past, and I prefer improvisations and conversations on free topics, like in Baldur's Gate 2.
Added 1 minute ago
Well, overall, you can play both. The first one is closer to me, and in the second one, there seem to be many possibilities and various features (I read a little about the plot, capturing fortresses, collecting taxes, etc.).