It's a sequel (even though in name only, pretty much) to one of the most popular and well-regarded CRPGs of all time, made by a developer with a great track record and lots of public goodwill, uses the incredibly popular official D&D IP, was hyped even before Early Access started in 2020 and has now been in EA for three years.

How is it different from other fantasy RPGs?

I only played like an hour or two yesterday, but the game leans really heavily into the "simulated D&D-campaign" flavour. You have a narrator acting a lot like a DM and you have very prominently displayed (and animated!) dice rolls for loads of actions and skill-checks in dialogues.

Beyond that, wealth of multiple choices and consequences for your actions have been touted as selling points, but I have not played enough to know about any of that.

It's incredibly polished so far, though I still find facial animations (especially eyes) somewhat lacking. But I just played through Cyberpunk and that is a high bar to reach in that specific department.