Um, it's about half and half. Like each mat (there were 3 mats that weekend) has 2 or 3 cameras filming. They edit each match so that you get different camera angles on each match. For example, in the Marcelo/Victor Estima match, they had one angle of Marcelo getting the guillotine from butterfly and finishing it. On the DVD, you see the same angle as the broadcast for the set up, then it switches to a camera angle right up against their faces so you can see Victor struggling and then tapping out.
Same with the Mendes/Rader match. You see the normal camera angle when he sinks the RNC, then it switches so you can see the grips up close and their faces. Stuff like that.
Overall it's better, because you can see all of each match in HD from better camera angles, but there is no commentary except on the Absolute Final and the Superfights, which kind of sucks. But there were a lot of good matches the broadcast didn't show so I think it's a solid purchase.
If you can watch the Replay for free and don't care about some matches starting late (Marcelo/Victor) or ending short...or the unaired matches with people like Jeff Glover, Murilo Santana, Justin Rader, and Rafael Lovato Jr for example, then maybe you may no want it.
Does that help?