Modified PS2: Pressed DVD vs Recordable DVD

My question is that why does my ps2 prefer pressed dvd than recordable dvd? Even if the scans are better on my recordables, it still prefers the pressed dvd backups. For recordables, the quality scores must be at least around 98 to be easily loaded on my unit. While in pressed backups w/ scores of even 0 can be loaded most of the time.

My ps2 is scph 30001 (1st US version) modified w/ magic 3 (dual layer capable).