From: Vancouver, B.C. Canada
I can't guarentee what most brands buy, except that: as of 4 months ago or so, I know that memorex was buying grade B CDs, whether that's changed (and which type, as in "platinum", they were marketing them as) I don't know.
Sometimes "S" grade CDs are called A+, they basically are for situations where you need a CD with less then 1% chance of failing. In my experience, I havn't had a CD fail in years (outside of my own fault of course!). Maybe I'm just lucky...but I know a lot of people the same way (shrug)....(by the way, we all only buy CMC...except for 90+min CDs from Ritech/ProDisc).
When I said the black's were more scratch resistant, I meant on the bottom layer (I know, that the bottom layer doesn't really matter THAT much). And that is from customer reports and personal experience. Though I don't rate them any where even close to Mitsui's scratch guard CDs, or even ProDiscs Gold bottom (true gold) CDs.
To be honest, Ritech's new CDs (new to us in the store, so probably a couple months old from factory) arn't that great in my opinion. I've had a couple problems with them in the store (test burning)...and I can say with great confidence that their 90+min CDs arn't even close to as good as ProDisc's...but oh well, it's what we have for now :( The Ritechs can only handle 94-95min and the Prodiscs can handle 99:59min I wouldn't have minded if I hadn't been burning a 97:34min CD at the time I found that out....
Hey, here's a question for anybody who knows. Does Mitsui sell 40x rated 74min CDs with their name brand on it? I've never heard of 40x 74min CDs up until now...but we got a shipment of Mitsui's own brand 74min CDs, and we burn tested one to find out their speed, and it burned perfectly at 40x (audio CD even!). Was it a fluke, or is this likely to be what they're rated at. (normally we're TOLD what they're certified at!) Thanks for any info! :)
Canada; Leading the world in being just north of the U.S.A.