some OEM BenQ models seem to have the retail firmware it seems. Mine did at least.
I don't know about the dangerous brother's firmware, but it seems the same. They may have unlocked portions of it though (like rip speed?).
Punch Cards -> Paper Tape -> Tape Drive -> 8" Floppy Diskette -> 5 1/4" Floppy Diskette -> 3 1/2" "Flippy" Diskette -> CD-R -> DVD±R -> BD-R
The Progression of Computer Media