As a kid, I never realized there was a difference. The new scene doesn't fit at all pacing-wise. The line "bring my shuttle" is delivered in such a way that it firmly establishes how pissed off Vader is. (Although if he was just going to get Luke in a few minutes, why should he be so pissed?) "Alert my star Destroyer to prepare for my arrival" simply doesn't work in that scene (heard it was leftover dialogue from SW) and the fact that the snippet from ROTJ with Jejerrod is on the end just goes to show how pitiful the thought process was. They put all that time into making a CGI shot of Vader walking up to the shuttle, and then cut to leftovers?