It really is a big improvement , it's a far more progressive style surfing board. It bridges the gap between the 8-2 and 8-6. The old 8-6 is modelled off the 8-10 but the new 8-6 is modelled off the 8-2 in every way it's basically a bigger version. Still 29 wide and 110 litres same as old 8-6, touch more unstable but it doesn't worry me at all. Punches through waves better and the extra tail lift gives it more boost when paddling for a wave. Definitely has more speed and a shorter turn arc which lets you come all the way round on cutbacks to do the full figure 8 turn and not the cheater cutback or dishpan.
The old 8-6 still has it's place for people just after a safer easier to ride board dropping down in size but the new one is just that step further forward without having to drop down to the 8-2 , which can be a bitch for us larger units. All bias aside there is nothing else on the production market that can match it for it's length and volume. It's really rail driving with true short board feel and just fun to surf , you may not look like you are surfing like Kelly but it feels like it

IMHO