DVD Media Reading
Both models share the same problem – beats and slumps of speed at the end of the disc as they reach 12x. The junior model had a smaller speed slump and read the disc through faster by 2 seconds.
None of the drives had any troubles reading a dual-layer disc. They both reached their maximum specified speeds (8x and 6x). The difference of 2x ensured the 5-minute advantage for the GO-0804A.
There’s a considerable difference between the models. The GO-0804A read the second layer rather unconfidently, with speed beats and slumps. The read speed dropped from 8x to 4x-5x, and the graph is all jagged. As for the GO-0404A, it slowed down to 2x at the beginning of the second layer, but soon got back to the normal operational mode. No speed slumps thereafter. That said, the GO-0804A still has a smaller total read time – the gap is about 2 minutes due to the difference in the speeds the drives process such discs at (8x and 4x). And they both read the disc to the end.
So, both drives work identically with molded DVD-ROMs: reducing their speeds at the end of a single-layer disc and having no problems whatsoever with dual-layer media. The GO-0804A reads DVD+R DL discs faster thanks to its higher speed formula, but the junior model shows more stability when reading such discs.