Far from me to call you stupid Dan.
However, you don't know what to say but you express that Rocco is sharing a remastering of someone else's old mp3 rip?
It's quite ridiculous, sorry...
Have you ever seen Rocco posting someone else's stuff?
Evidently it is not clear to you that he is a collector who only rips (and share!) his original records.
The records are what they are, sometimes well and sometimes bad mastered or pressed, engraved or whatever.
The same CML 001 shared here comes form an original vinyl, have no doubt.
Maybe someone with technical skills can shed some light on this kind of spectrograms.
Fly Record AS 51&52 were recorded at Umiliani's Sound Work Shop Studios, which is usually a guarantee of quality, and Rocco's vinyls are the originals from the era.
So, what happened? This could have been a good point to post. IMHO.