Broken Sword 2 is a decent sequel to Broken Sword 2, but definitely weaker than the original. The story is not as good, with a far more black and white us vs them (while the original had three factions which made the story more interesting). For the longest time I was afraid they had remade Nico into nothing but a side-character who does nothing but get rescued, but luckily she does get to do more stuff later in the game.
The biggest let down was the number of time-wasting puzzles though. I.e. puzzles that are not hard to figure out, but takes a long time to do... or in the case of the jungle section, not even to do, just walking around (in the directors cut of the first game it was possible to fasttravel by dubbelclicking... the remastered version of the second does not seem to have that). Or when you want to tie two things together with a rope and you click on one of them and George instead says it would be better to tie it to the other first... instead of just doing that.
Together with some puzzles that have frankly stupid or contrived solutions (or the puzzles themselves are contrived) it certainly makes it weaker than the first game and far shorter. Sure it took me 7h vs the 10h of the original, but I'd still say it was half as short... the additional two hours felt artificially prolonged by the time-wasting aspect of some of the puzzles.
However, while it is IMO weaker than the first game, it is still a good adventure game. If you enjoyed the first you will probably enjoy this one for the most part. If you haven't played the first, start with that instead.