Legion -
Exorcist III - Director's Cut
An interesting watch, for sure. A lot of it is the same, with a few additions here and there. They put the Eraserhead line back in that was so funny in the script. Seeing only Dourif in the cell scenes made for a hugely different experience, his performance was pretty different, as well. And that cell set, Christ. Was that a hospital room or a goddamn dungeon?
Also, hate to be that guy, but I can see why the studio had reservations with the ending. I'm not saying it needed a full blown exorcism, but the scene is pretty brief and is over pretty quickly.
Oh, and in the special features, you get to see Brad Dourif review Exorcist II, and it's goddamn hilarious.