Kubrickfan is right about the remixing and potential and usual actual difference.

I haven't bought into SACDs, though with current equipment it would be no problem. SACDs can be quite variable and it's hit-or-miss.

Furthermore, they are mixed according to the producer-mixer-audio guys tastes. Of course this is also true of stereo CD and vinyls.

A "work-around" for this is to change the levels of the channels according to YOUR taste. This would work and might often be required. So in addition to level changes via remote I would like to be able to change levels individually from the front panel. Not gonna happen.