The '97 SE work was partly done in 2K whereas the new scan in 2004 was done in 1080p. Like Laserschwert said, the '97 SE was done for theatrical exhibition and the resolution of that work has nothing to do with what later happen when making a video release. We are fully aware that Laserdisc doesn't equal 35mm film resolution. This stuff is irrelevant anyway, the question that often comes up is whether they did the '97 "restoration" by actually alter the original film elements without having or making backup material, which is extremely doubtful. It's Lucasfilm marketing speak.