As i said before, IIUC everything is crapshoot, if we don't know the origin of a file.
Correct ?
Sure, but how's that different than it's ever been? There are multiple releases of records, CDs, DVD-As, SACDs, etc. Tho I don't usually buy a "newer" version of something just for the heck of it I do have enough duplicates to know that I almost always like, say, SACDs better than CDs, a little less often I like DVD-As better than CDs (too often I don't like DVD-A surround mixes.) and mostly 88.2 and higher rates better than CDs. But some music's source was too low of resolution to start with or was so overdubbed that the music is eternally muddy, etc...
You can at times find out from a review that there's something special about one particular release or another... You can learn which masterers, labels, etc. produce the music the way you want, etc. For argument sake you might find a label whose 192 recordings you always find superior to lower resolution recordings.
If HDTracks was trying to rip us off they'd have everything in say both 88.2 (or 96) and 176.4 (or 192) My experience is that they take reasonable care. As I explained earlier I still don't pay extra for 176.4 or 192 over 88.2 or 96 unless I know something for certain because I don't regularly hear a significant difference. Personally I hope that Acoustic Sounds (and others) provide a lot more DSD releases as time goes on: I often find I often find I like them the best. In the mean time I visit HDTracks and various label's sites quite often.