I have many XRCD's and they are significantly better than standard masters, much closer to and some equal to 24/96 sound quality.
Some favorites in my catalog:
Boss Tenor [XRCD] (1960) by Gene Ammons
Cookin' with the Miles Davis Quintet (XRCD) (1956) by Miles Davis
Way Out West [XRCD24] (1957) by Sonny Rollins
Black Pearls (XRCD) (1958) by John Coltrane
Stan Getz With Cal Tjader [XRCD2] (1958) by Stan Getz
Flamenco Passion (XRCD) by Gino D'Auri
In Japan (XRCD24) Sonny Rollins
Portrait in Jazz (XRCD) (1959) by Bill Evans Trio
Some favorites in my catalog:
Boss Tenor [XRCD] (1960) by Gene Ammons
Cookin' with the Miles Davis Quintet (XRCD) (1956) by Miles Davis
Way Out West [XRCD24] (1957) by Sonny Rollins
Black Pearls (XRCD) (1958) by John Coltrane
Stan Getz With Cal Tjader [XRCD2] (1958) by Stan Getz
Flamenco Passion (XRCD) by Gino D'Auri
In Japan (XRCD24) Sonny Rollins
Portrait in Jazz (XRCD) (1959) by Bill Evans Trio