As far as the pro wave goes I don't believe there is any difference between the 9'6" and 9'10" 2014 and 2015 models.
However the other pro waves are a bit shorter, have a slightly fuller nose, different concave bottom, domed deck and thinner rails.
The shaper explains the differences in this vid
I ride a 2014 9'6" pro wave.
At the demo day in Torquay I trialled the 9'2" 2015 pro wave. A bit shorter but way more lively than my 9'6".
Just as stable. I loved it.