It is, but the drive does not support newer media, unfortunately. It is very good with MCC004 and 8x rated TY media.
In that link you showed me, the liton 5239 with 2$0C seems to come out pretty well?
Error figures are indeed rather low, but the jitter is high. Lowering burn speed doesn't help very much here.
The reason I said about the sony was this post :-
Shows a 0.05 C1 error average rate!
Maybe just a matter of the scanning drive. Some drives don't report all errors, so you can't compare scans taken with different drives. Also, I consider my 5239 as "too error tolerant", that's why I decided to use my Benq DVDRW as only CD scanning drive.
As far as I remember, the "V" has a slightly different chipset. I wouldn't take the risk of crossflashing.