¡Que siga la fiesta!
I'm lucky to have a couple '60s Blue Notes I acquired back in the '80s, but never did a side-by-side sonic evaluation. Although, about 20 years ago, before the recent LP boom, a friend and I did an A/B Blue Note comparison with Eric Dolphy's Out To Lunch: the '80s CD vs. an '80 re-issue LP. (At the time, my friend bought and recently restored an EICO, I think it had smoooooth, sweeeeet EL-84s.) The difference? Well, the CD seemed a little harder-edged and bulkier with stronger bass and glassier highs; the LP didn't hit as hard, and had muddier bass. In the end, we decided it was just whatever one fancied for sound -- both had advantages and disadvantages.
It's also like we were discussing on another forum--remastering 55+ years old tapes, you are bound to encounter some losses. It's not so much storage degradation alone, but from wear, as some of the masters were used so many times for reissues. And back in the 80s and 90s, the record companies at first were not careful about which masters they used--many early CDs were made from LP production masters (which often have the LP's EQ mastering settings committed to the tape, to make recutting the album easier). I did poke around a bit for original 1964 releases of the Horace Silver album, but there was nothing better than VG+, some VG or G, and prices high.
For kicks I found the Dolphy album on Qobuz, and I'm streaming it in hi-res at the moment. It's a very nice sounding version, very clean.