I've bought countless spindles of RIDATA 4X DVD+R from newegg, and they have all been RICOHJPN R01, with great burns. The same applies to my collegues who I've recommended this media to.
On the other hand, several of us decided to upgrade speed and bought the 8X RIDATA.
These were all RITEK R03.
We all got terrible burns and never bought them again. I still have remnants that I have not decided what to do with as yet. It's just a handfull and I might use them for Ghost backups.