First I thought the CL9M have problems with CMC MAG D03 which the CL9J don´t have. But this MID is old and my Philips seems to have extreme vary of quality.
MCC 004 is a problem for both FWs
And didn´t noticed a difference with the media I tried
Like I wrote some time ago, the newest MID of DVD-media I saw was in 2008 or 2009. I´m sure the media-properties changed with most of the MIDs which are still available but I doubt the drive-manufacturer change the write-strategies.