The jitter for your first scan is an excellent result for Verbatim AZO CD-R (97m34s23f). I don't know of any drive which can consistently produce lower jitter on these discs. (For the record, I'm a die-hard Verbatim AZO fan with 50+ optical drives in my cupboard. )
Did you buy them recently? Or is it an old pack?
The quality of these discs is highly variable these days. It's been a long time since I saw a disc that good from recent production. (Where were they made? And can you read the first part of serial number printed in the centre of the disc?)
The sort of firmware modification you envisage has always been the sole preserve of the drive manufacturers. And even if you could tweak the strategy, I doubt that it would be possible to produce consistently better results. The jitter that your Benq is measuring is the product of several factors which affect the apparent pit/land length (crosstalk from adjacent tracks etc.), not just the timing & power of the laser during the write process.
Modern high-speed Verbatim Super AZO CD-R (almost) never show super-low jitter like Taiyo Yudens. If you want Taiyo Yuden-like jitter from Verbatim CD-R you'll need to track down some of the old slower Metal AZO CD-R from ~14+ years ago, or some of the earliest Super AZO from <2005 made in Mexico or China.
And the only reason to seek super-low jitter is if you're a CDFreak and want to explore what's possible and where the limits are. Jitter needs to be a lot higher than 10% before it affects the readability of a CD, and it cannot affect the sound quality. (Read errors may be audible, but it is easy to prove mathematically that jitter cannot affect the tone etc.)