Not sure what the confidence intervals of these numbers are. For example, the BH14NS40 drive is listed with an accuracy of 99.4937, whereas the WH14NS40 is listed with 98.0869. These are the same model of drive with the black and the white front respectively.
Sometimes it's different firmware revisions, sometimes it's just statistical noise...
I wrote this article mainly for myself... I just converted the dbPowerAmp stats into a somewhat searchable JavaScript table and added some useful notes I found out over the last days. I did not expect HN Top 10 for a whole day with this... :-)