If the v6 to v8 jitter reduction of 40% is reproduced here, the G65 is going to sound better than a G68SL, as well as being cheaper.
What jitter reduction? Seeing that MMHR is limited to 6 channels it is rather likely that no changes were done to the internal cards.
Strange thing is that the technology is already developed (OE14 / ID26, OE34 / ID29). I can understand that M does not want to cannibalize on 861v6 sales, but after 4 years you do expect something like the 8 channel architecture to trickle down to the lower series.