The waveforms and spectra of the two versions are then so similar that I didn't bother trying to ABX them.
btw, it's interesting just A/B-ing the tracks without level matching. The level difference is obvious, but I bet 90% of people would also claim the louder track is brighter - probably better over all, as well as louder. Whereas once they're level matched, they sound identical. I wonder how many people have done listening tests biassed in this way?
It's quite possible that the differences heard are do to less than ideal sample-rate conversion.