You don't have an inferior digital version. UCCU-5669 is identical to the 75th anniversary SHM-CD, TOCJ-81013. It does have a bit of compression added, which sometimes bothers me. A description, I believe, Lon gave on the Hoffman board also outlined other gains over the SHM-CD. Since I have no intention of going back to vinyl ever again, the SHM-SACD is of interest to me.
It's a shame the bonus tracks are absent on these SHM-SACDs.