There's no point in trying to duplicate CATS scans, it's completely irrelevant information. As is comparing scans from different consumer drives. The 1693 LiteOn is a pretty good burner and scanner, a fair ripper and good all-around value.
All scans are firmware affected, regardless of the drive. The LiteOn, Benq, Plextor and NEC drives are all producing reasonable scans, it makes no difference which you use. Physical variations between individual drives, as well as variations in the firmware effects on those same individual drives, make comparisons meaningless.
In spite of what some forums would like to have you believe, the CATS devices are not giving us any information that we can really benefit from, apart from the low level tests of physical disc characteristics that consumer drives do not report. As far as PI/PIF scanning, they are just another drive, no better or worse than consumer drives.