Unfortunately I can't test in another burner.
MCC-003 are Verbatim 8X DataLifePlus Adv.AZO (made in Taiwan), jewlbox
OPTODISC-OR04 are Samsung 4X PleoMax, sold in 25x cakebox
SONY-D11 are SONY 8X AccuCORE (made in Taiwan), jewlbox
They're all +R.
I didn't bother too much with those Samsung which were probably too cheap for their own good, but I was kind of expecting more from stuff labeled Sony and especially Verbatim (as I get top notch scans with MCC-002, Verbatim 4X Made in India).
Or maybe it's just Taiwan who don't know how to manufacture DVDR ?