Okay, so I caved in and bought this new GB double feature. Again. I was expecting it to be the same transfer for GB1 but SURPRISE, it's not. Much less dirt, better neutral color timing, and most important of all, NO DNR ARTIFACTS. Yes, all that annoying shimmering on books and other high frequency details is gone. Now we can actually see textures and details when things are in motion. Excellent.

Okay, now for the bad stuff. While this new transfer is cleaner, more detailed, and has better color, the gamma is definitely higher. This means that you get to see more shadow information than on the old disc, but also more grain. It's not that bad but the library scene in the begining is definitely too bright. Not always in the form of blown highlights but the image is dramatically brighter. Also, the new transfer is missing a tiny amount of information on the sides compared to the old. Not a big deal though. The old transfer was probably too wide, and it also had bars on the side, making the image smaller.
Now for the strange stuff I noticed. In a few shots near the end, when the GBs are encountering Gozer. I'll try to post some comparisons soon.