LG 4163 CD Speed results



I have just bought an LG 4163, I also have a NEC 3500, and I noticed that when I burn a DVD with the LG and I use Nero CD Speed to do a transfer test, the transfer test starts at 4.2x speed and takes 7.5 minutes, but when I test the same DVD with the Nec 3500 the transfer test starts at 6.5x and takes 5 minutes to complete the test. And sometime the test results are very different. Why does LG start at a slower speed and take longer for the same DVD? Is that good or bad and which results are more reliable?