Not very scientific or perhaps accurate, however these are my findings.
The original track was down sampled to 16/44 from 24/96, using Audacity. I've never used it before, but it seemed straightforward enough.
Both files were saved as FLACs and played back through my system using XBMC as the player. My partner also took part and had a listen not knowing exactly what or if any differences existed.
Between us both, although more my partner (she has younger ears), there was thought to be a discernable 'rawness' to the original high resolution file. Noticeable, but not in a typical night and day sense, you would have to be listening carefully for it.
Of far more importance and ultimately more obvious, was the immediate sense of quality that the recording had. Clearly very well put together.
For me though, the jury is still out there and what I heard, if indeed it was anything at all, was a small difference in sound quality that for me, does not justify the price of the file. Perhaps a more revealing system would split the difference more resolutely.
For some though, ultimate quality is of paramount importance and the cost will not be an issue.