B/c the sculpt isn't as detailed, it has cardboard cutouts rather than sculpted pieces, poorly detailed and blandly painted accessories, tiny weapons, two floors, less accessories, no dungeon walls, no secret entrance, no ledge, and it's much smaller (despite what people claim...).
NOT a knock on the vintage castle btw, it's one of the most iconic toys ever made. But I'm truly baffled as to how anyone thinks the size of this jawbridge is so important that this castle somehow becomes not much better than the vintage castle.