I was doing some comparisons last night between the two editions and I'll start with the video. I did not see a huge improvment in picture quality on the EE. The EE was a little more detailed and sharp. But not a big difference. Now when it came to the audio I found the DTS-ES track on the UE better than the DD-EX track on the EE. The DTS-ES track was more defined and the bass on the DTS-ES dvd had a lot more impact than the DD-EX version. Two scenes that I use are the one at the begining where Arnold steals the motorcycle and the guy comes out of the bar and unloads the shotgun. And close to the end of the film where Arnold has the mini gun. Those scenes rocked my house in DTS-ES, they were felt and heard. So to make this simple, I am keeping my UE and sold the EE to my friend for $12. Just my 2 cents.