Results: Average Joe Consumer should have purchased the 16/44.1 version since it sounds identical to the HD version and save $6. Buy 2 of such albums and you'll save $12, enough to buy a third album.
Case point: If the Pono music store decides to sell different resolutions of a music album, and this goes for any HD music store, we still have no idea whatsoever about the mastering for each resolution. For all we know, the 24/96 version of "Up Close" could have been up-sampled from the CD version since a frequency response analysis looks pretty much identical with the exception of some 25 kHz noise. Or maybe it could be the case that the 24/96 version was indeed just down-sampled to 16/44.1, so the master is the same. In short, listing the mastering type/version should be far, far, far more important than the resolution.
^ I actually moved my cursor to about the 1000 Hz area and both versions measure at around -33 dB, which may suggest that these are the same master
Now I feel cheated for my money and I just wasted, in essence, $16 on the 24/96 version that provides no benefits.
HDtracks.com is the only store that distributes the 24/96 version of this album:
http://www.ottmarliebert.com/music/album/up-close