You're asking people to compare apples and oranges. XRCD is a very careful mastering process. SACD is a digital format. If an XRCD mastering job were put on a SACD, it would probably be indistinguishable from a 16-bit disk.
XRCD vs. SACD
Having listened to several JVC xrcd's on some state of the art redbook gear, I am of the opinion that most that I have heard sound more natural to me than SACD on a budget Sony SACD player. I have not, however, listened to any higher-end SACD players in my system. I would be very interested to hear from those who have made this comparison and can provide some input with regard to how the XRCDs compare.