Well, Yellow Brick Road has some wonderful music on it, but the recording was so-so in my opinion.
Too bright in spots, recessive vocals, shelved up dynamics, etc. etc.
The SACD release (Hybrid) does improve on that, and interestingly enough, the redbook layer on that disc sounds better on my Exemplar 2900 than any other version I've heard short of vinyl. I'd say somebody tweaked it for this release- and for the better.