Merc CD vs SACD? As a group they are somewhat less aggressive than the CDs. They have the gimmick of incorporating the 3rd (center) channel in their multi-channel mix (but since my speakers are KLH-9's, I'm not going to be 3-channeling soon). I do have a pair of Oppo 981 SACD players for the purpose of doing AB's, so I'll do some Merc CD/SACD trials and report. The SACDs are a bit louder than the CD so it is not an easy comparison.
Mercurys are a bit forward (in your face, bright, etchy et al)? You bet they are. Add to that the pressing mania (FR, RFR, "M", AMS, SRI, and the dreaded "vendor"), and using different people for cutting the mono & stereo pressings, it becomes a collectors nightmare.
The 90143 did make it to Golden Import status as SRI 75057, but I can't find any CD of it. I always felt this disc was a sleeper (mine being a RFR-1, meaning "fine Records/Richmond, Indiana pressing plant, VENDOR, meaning whatever). I'd like to have a FR (RCA) pressing, but I don't know if one even exists. Since Universal has such a pissy attitude pertaining to reissues, I think that the Mercury CD issue/reissue is dead for now, with the exception of whatever Archiv wants do do.
The vinyl side could be brighter if Speakers Corner gets back in their Mercury mode, but Kai Seaman says that the discs aren't selling as well as expected. He is responsive, and a few plugs for a 90143 reissue can't hurt.
I'll get back with SACD/CD in a few days.
bob berkman, mojave desert