Maybe this is old news but it appears that the replacement DVD-A discs that were sent out long ago have a different and inferior mix than the replacement blu-ray discs. I never thought the mix on the replacement DVD-A sounded very different than the original DVD-A aside from bumped up vocals. A friend recently brought over his blu-rays since he said the difference was dramatic between the original and replacement mixes. Well, his replacement blu-ray does sound dramatically better than either of my DVD-As!
I've been digging into this since this was always one of my favorite Simple Minds albums and I was never completely satisfied with the mix. I ripped original and replacement 5.1 mixes from the blu-rays and DVD-As. The 5.1 mixes from the original blu-ray and DVD-A completely cancel out with the inverted phase null test so they're identical. The 5.1 mix from the replacement DVD-A has a similar waveform to the originals but the levels are different with the vocal channel being the most obviously changed. The 5.1 mix from the replacement blu-ray has an obviously different waveform in the front and surround channels at least. It seems like a different mix than the other three. It sounds a heck of a lot better too!
Here's Waterfront waveforms for the new blu-ray at top, new DVD-A in the middle and old BD/DVD-A on the bottom (the differences will be more obvious if you download the images and flip between them):