Digital Noise Reduction is the enemy of 1980s film stock. On the official 4K, Han Solo's face looks like wax in the Carbonite chamber. Here, you can see the stubble, the sweat, the fear. The snowspeeders actually look like they are flying through snow, not over a green screen.
Since 4K80 is a community project and not an official product, it is not sold in stores. Empire.Strikes.Back.4K80.2160p.UHD.no-DNR.35mm....
The "80" in the title refers to the year 1980, signifying that this is a preservation of the original theatrical cut. This means: Digital Noise Reduction is the enemy of 1980s film stock