There isn't going to be much variation between the Sony, Lite-On, Samsung and Pioneer drives on quality media like the TY and Verbatim discs everyone is testing on. The real bottle of the drive is revealed when burning sub-standard disks like some crappy MBI 16X, Sony 16D1 and those horrible Frontech and Princo (yuck!) disks.
that's where Pios and Benqs are quite good, LGs are horrible, and Samsung/L-O are middling.. it depends on the chipsets being used in the drives.
L-O and Samsung are using mediatek, traditionally very good on maxell, TY, Verbatim and Ricoh R01/R02 disks. Benq used their Nexperia chipset on the 16xx series of drives, Pio use chipsets developed with NEC, and LG use chipsets from either Panasonic or Renesas.
Another thing.. all these "20X", "22X" and "18X" writer speeds advertised are, for the most part, useless. They can burn say 2-3 MIDs (Yuden000-T03, MCC004, MCC03RG20, TYG03, MXLRG04 etc.) at 20X.. have you seen 20X media anywhere? Thought so..anyone tried 20X burns on the 16X Verbs though? I'd love to see results at 8X, 12X, 16X and 20X on those. I don't have a 20X writer, so if someone with an S-203 or L-O/MBI 20X drive can compare the media at those speeds, it would be appreciated.
Whew.. long post.. to summarise, don't go by the brandname if all you're going to be doing is burning TY 8X @ 8X.. heck, my old 812S@832S does damn well at those speeds with those discs!