Well, the idea is to start with two versions of some music, which nominally are the same - if they sound identical to you that's probably as far as it needs to go ... but if they sound different then there should be some reason for that - you know, that ol' cause and effect thing. That's where things can become interesting - in fact I might even use a scary world for that, "science" - of course many people work on the basis that Authority Figures already know everything that needs to be known, for some reason this is also called science ...
Started on examining those files, and so far the resampled version does not match the original, at about 55dB down - need another round of perusing to get a handle on it ...