I have to agree that the TYG02's burn better, according to the slightly dubious scans on the NEC, at their rated speed rather than at the 12x the firmware allows. I have been restricting them to 8x tho.....
I have some TYG03's to try, these I will burn at 16x tho as that is the rated speed, otherwise you pay more for a disc that doesn't do its job.