[QUOTE=AlKwas;2783398]I think the maximum scanning speed is limited by the quality of the drive, but lower speed will produce better results than maximum speed. Why at the lower speed the results are worse?[/QUOTE]
They’re not really worse.
It is just the way that particular drives reads a disc.
Here, there is not that much difference. The overall trend is the same. You can tell that the disc is OK – not great, not bad.