I don't know very much about jump technology as I don't possess official guides or books that mention things like that.
The difference between jump points and the wormholes used in Prophecy are that jump points apparantly allow quick transport via a wormhole that is opened using the Akwende drive and whatever anomalies that might allow the jump technology to work.
The wormholes in Prophecy are constantly opened, and as Finley theorized, the other side is in the "Nephilim" system. It might not be necessarily true, but the final mission shows that sensors can penetrate the wormhole and read what's on the other side. So, one might think that they could get a glance of what was beyond the wormhole gate before it was blown to pieces. Jump points are not always open, and that's the difference.
Since the wormhole is constantly open, it might not be a stretch to say that once they set the opening of a wormhole, they could set the other end of it wherever they might need to and it would stay that way for however long they might need it. It's tough to make a definite assertation without further knowledge of their technology behind wormholes. It might be a commonly used tool for them, since we see two of them occur a short time apart in Prophecy and SO.