Hmm.. never heard of this model before. Judging from the high jitter, I suspect this model might be using a chipset from Renesas. The H10A and H10N both use Renesas chipsets and display the same high jitter. With those two drives, scans with a BenQ writer may look quite awful, but the same discs when scanned with Lite-On writers look pretty good. The discs themselves seem to playback fine as well. So you may not be able to trust BenQ scans of discs burned with this writer.
The way to confirm that this is a Renesas chipset model (without opening the drive up) is to do an 8x and a 16x burn using Nero CD Speed's create disc function, then observe the graph created. Renesas chipset writers have 8x burns which start at 6x then jump up suddenly to 8x (Z-CLV). 16x burns show a very distinct P-CAV graph and are about 5:30.
In contrast, Pansonic chipset writers produce Z-CLV graphs that start at 4x, then jump to 8x. Also, they burn 16x discs using CAV, so the graph produced is very different.