So, I was fiddling around with that scanline shot in the GOUT. It kinda looked like there was artifacts of scanlines that had been smeared away, watching it on an endless loop there definitely looks like some kind of layer there. But it also really just looked like noise or grain. So, I took the fullscreen pic with the scanlines and played around in photoshop. The first thing you notice is that the exposure and brightness is way different, possibly because the scanlines darken it. But anyway my theory was this: if the GOUT is just that image but filtered and brightened, it should be possible to re-create it using this supposedly original image.
No such luck. I got the brightness/exposure levels to sort of come close, but it still looked very different, and it was really obvious that the scanlines were still there. So, I thought maybe if I soft filtered it, they would go away. Eventually they actually did start becoming less visible, but the image was a soft mess. The GOUT image has pretty good fidelity on the power generators, and the dead giveaway is that the writing and other electronic markings on the side are as pin-sharp as the GOUT gets. I also tried to see if I could make the colours of the electronics change--no such luck. It's simply not possible. You end up with a red power generator.
Conclusion: the GOUT is a totally different image than the 89/92/whatever the fullscreen sample is. The electonic viewer markings are coloured differently, and there's no scanlines overlayed. The scanlines are artificially composited, not "burned in"--for instance, the shot of "We've spotted imperial walkers"; like most scanlines instances, its created by playing the footage back on a television monitor and re-photographing it. Such is not the case with this one from what I can. So the GOUT is an earlier version, or possible the "original" clean version.
How it got there, I don't know. I also can't say if the scanline version is "original", maybe they added this to a later re-release, or had it done in 1980 but it was never ready for any theatrical version but then was able to be seen for the video releases done later. But yeah. I'm calling the GOUT a totally different version of that shot.