Verbatim DataLifePlus always use MCC/MKM dye as far as I can tell from reports in this forum.
Verbatim DataLife discs (not Plus) are usually produced by somebody else.
Verbatim Pastel discs are produced by Taiyo Yuden.
The batch of Verbatim DataLifePlus DVD+RW 4x media I have used (MKM A02) are not as good as some Fujifilm DVD+RW (RICOHJPN W11) discs I used, at least not on a LiteOn LDW-851S@832S, a NEC ND-3500AG and a Plextor PX-712A burner. You might consider using RICOH produced DVD+RW 4x media instead of the Verbatims.
Oh, and one more thing: Just because your buner likes a certain brand of DVD+RW discs doesn't necessarily imply that it will like DVD-RW, DVD+R or DVD-R discs from the same manufacturer.
Here are some scans (Note: the Fujifilm scan shows 388 errors, but there are in fact no errors on the disc - the errors are falsely reported at the very end of the disc because the scan went past the area that had actually been written):
The difference in PIE/PIF error rates are similar for these discs written on the NEC and Plextor burners mentioned above (scans not included).