MRY
Wormwood Studios
Baldur's Gate is a totally different and inferior experience. I would say that KOTOR II is probably the closest you're going to get to the PS:T/MOTB experience. I gather the restoration patch smooths some of the rough patches. I'm not sure there are really any other games that would fit the bill. By the way, this isn't to say that KOTOR II is in the same league. I think it's basically PS:T and MOTB neck-and-neck, distantly followed by KOTOR II, followed by nothing. V:TM:B has some nice writing, scenes, and reactivity, but without a party it's not really the same. And all the other party-based RPGs are either fairly generic or poorly written or both.