Most things missing from the audya in the sd7 made their way i to the sd9 pro

But also some new innovative things like
- user samples
- improved sample size and rom, lots of new sounds
- launchpad
And offcourse many new guitar, drum percussion and bass live sounds.

Does the sd9 really sound much better then the sd7 and sd40 and audya?
Hard to say, since those allready sounded great.
I did really enjoy playing the sd9 when i got the chance.

To me, the audya imterface/screen feels outdated when it comes to user friendlyness, so an update from an audya seems a good step..

However i am still not convinced if an update from the sd7 is worth it, for people that have no interest in the launchpads...