It looks like it's the same size as the S950 but 3lbs heavier.
The weight difference may be due to slightly larger speaker boxes, and the new amplification system. These instruments sound very impressive.
We were fortunate, here in Atlantic Canada, to be the first in North America to see and hear the new PSR line, which was very capably demonstrated by Peter Baartmans, who is not a only a superb player, but a very nice and very humble guy.
I am very much looking forward to getting my demo model and exploring all the great new features.
Ian