But the Longten has been burnt in a Pioneer 106D, right?
Since I was a bigger newbie back then, I would usually go with max speed, if it was 8x, I'd go for 8x, if it was 16x, I'd go with 16x.
Most of the other DVDs are atleast two years old.
Things get kinda clearer to me. LiteOn burners were not very good until recently, add to this disc quality variation, drive aging possibly impacting the consistency of the scans, possible early aging of the discs from difficult conditions (temps and humidity), possible fake media, bad batches of discs...
....You've thrown too many things in the basket at the same time, actually... :bigsmile: - it's ony natural, given the circumstances, to be confused and come up with such a thread title! LOL
Seriously now, you can't make proper comparisons or conclusions based on these elements. Without original scans performed at the time of the burn, we're left to conjectures! :doh: