Marantz SA-10 arriving Monday!

elizabethThank You for chiming in. The single layer (SL) SACD will only use its designated laser. The hybrid will use both CD and SACD lazer(s) per design.  Those early SACD titles were sourced closer to the master tapes.Once the hybrids came onto the scene, remastering/remixing,  became common practice. As GK reports above, usually means more compression.
Happy Listening!

blueranger and elizabeth
if you have a title on SL and Hybrid test for any discernible difference(s)?
Happy Listening!

I can testify that the CD layer of SACD hybrid is BETTER than the same music same recording from a previously released CD. Yes I own both of two performances now.
Classical, and the hybrid disc CD layer sounds better than the same performance on an earlier release on CD. (Being played by one of my five disc CD changers to the Marantz SA-10 as a DAC.)
I would think it is due to more care in the transfer from the master tape?
As far as compression, I only own Classical SACD, and I have to say they sure are not suffering from compression. For Rock I have no experience. I have not bought a new Rock CD in over a dozen years. About eight years ago I bought 2,000 used Rock CDs... Then resold about half.
I bought used Jazz CDs, Classical used CDs SACDs...

jafant,

"...if you have a title on SL and Hybrid test for any discernible difference(s)?"

Roger Waters The Wall Live In Berlin sounds exactly the same to me on single layer vs. hybrid SACD. Someone may say it may be different with better equipment and different listener but those SACDs are surely not strikingly different.

Correct me if I’m wrong but didn’t you just answer your own question?