All righty party people. I just finished my simulwatch of the DVD version of the movie and my original airing (hereafter: OA) tivoed version of the movie. There are indeed scenes on the DVDs that were not in the OA. Here you go...
1. At 3:12 (all times listed are DVD times) there's the scene where Sam's with that girl Donna in bed. In the OA they just roll right off the bed, but in the DVD version, there's some conversation before the roll off the bed. All of that conversation before they hit the floor is extra.
2. At 21:18, Sam comes back into the clinic with Beatrice and announces that they have a new plan. In the OA that scene just continues as Sam starts to gather supplies and explain what they're doing, but in the DVDs they cut to the court marshal location and there's a conversation between Sam and the guy in charge where they guy in charge is trying to get Sam to explain what happened to the clinic. That whole scene is new and then they cut back to right where they left off in the clinic.
3. A small one, but at 47:26, you may notice the guy who's taking notes is eating something while he works. Looks like a brownie or something. Anyway, the guy in charge asks Sam is he worked with Luis and then it cuts over to Sam as he answers. In the OA it just cuts back to the guy in charge continuing the conversation, "He was the senior operative..." In the DVDs though, when we cut back from Sam answering the questions there's a really short little thing where the notetaker guy offers the guy in charge some of his brownie. The guy in charge takes some, sticks it in his mouth, chews, and then gets back to the "he was the senior operative..." line.
4. At 48:11, there's the scene where Sam is teaching the farmers some high school football plays, and there's an extra play in there in the DVDs. In the OA it goes straight from the "Nickel Defense" to the "Prevent Defense." In the DVDs we also get to see the "Dime Defense."
So, there you go. That's all the differences. Not too much. That one at 21:18 is the longest. The Bruce Campbell fans will surely enjoy the extra shirtless time at 3:12 though.

Fun times.