well the obvious thing would be to say "the SACD is bound to sound better than the DTS CD".. but I'm not sure its as open and shut as that, there's a few potential other factors at work (imho) maybe..
1.) there's nearly 20 years separates the DTS CD from the SACD, one would think DA converters and mastering processes have improved in the years since?
2.) the DTS CDs of old Quads are said to be from DAT dubs rather than the original master tapes like the DV SACDs, maybe that's a factor?
3.) Crazy Eyes was a remix done after the Stereo had been out a while, whereas Seven & Cantamos were recorded with Quad in mind from the outset,
4.) Crazy Eyes mixed by Larry Keyes, Seven & Cantamos mixed by Don Young, different engineers with different styles and approaches mixed in different studios..
5.) Mike Dutton better at remastering than DTS guys (Brad Miller etc)?
oh I dunno.. could it use an upgrade? possibly. is there one? not right now. personally I think DV will go onto other artists before they revisit Poco but i could be wrong, maybe they're "Deliverin" "Crazy Eyes" next, the secretive little devils!!!