Just got my 812s today and updated to US0N and have my 811s with HS0Q. Burned the included dvd+r that came with 812s at 8x with media code:
Unique Disc Identifier : [DVD+R:YUDEN000-T02-000]
Disc Type : [DVD+R]
Manufacturer ID : [YUDEN000]
Media Type ID : [T02]
Product Revision : [Not Specified]
Disc Application Code : [General Purpose]
Recording Speeds : [2.4x - 4x - 8x]
Blank Disc Capacity : [Not Supported By Method 2]
[DVD Identifier - http://DVD.Identifier.CDfreaks.com]
Anyway, the kprobe differences are incredible and was trying to figure out which one to trust. I also find it odd that the 812s reported no PO errors at all. I was also too lazy to wait and scan the whole disc, but I scanned roughly the same amount of the disc with both drives. More testing to follow.
Oh and in the 812s scan pic, kprobe reports no media no disc because I saved the pic after I ejected the disc.