I know for a fact that SE includes Internet Connection Sharing software, so if you have one IP but more than one machine you want to connect to the internet, you no longer have to buy Wingate or Sygate. Of course, you do have to buy SE, so the savings don't really add up. 😉 Other than that, I don't really know. There's probably a lot of patches that you may not have, and prolly some other goodies as well.