Hmm. I wonder if it has something to do with tracks being panned L/R vs. up the middle. The soloed bass tracks could also be louder since Garage Band normalizes on mixdown. I'll have to go back and listen again, myself. Just to be clear, when I refer to "the original 'A' track," above, I mean the one from the original comparison, weeks ago. Sorry if there was any confusion there. That aside, how'd you like this pre? Either on its own merits or relative to the others. If the latter, probably better to use the soloed, up-the-middle tracks as a basis for comparison.