The comments about the upscaled content looking better on the BD than the 4K disc are stupid, given the upscaled content looks to be identical on the two different formats (impossible to tell bit for bit without ripping them). Having made that major an error, I don't feel I can trust anything else this review says eg they then go on to mark down the picture quality because of the upscaled Live Aid. That's dumb because a) the main event here is Montreal, the Live Aid is filler and b) Live Aid was shot on SD video, it's never going to look any better and should be scored on how well it extracts what there is to be had.
I suspect the upscaled Live Aid content looks worse when compared to 4K Montreal than to 1080p Montreal, but that's perceptual bias and reviewers should be aware of it.