Regarding Ketron and styles.
Yet (imho) there are not any other brands who made a arrangerkeyboard sound as live and as ONE band as Ketron managed to do with i.e. SD1.
To be honest, I don't know about Audya other than heard and seen at the web so far, simply because the long time it took before it arrived this country, and when it finally came, the price was so sky high that I did not even find it worth to try it live.
It's easy to make styles who may sound good if you play only that one, but to maintain the trick to make it sound good and as you not change the whole band at the stage whatever style you play without do a lot of tweaking, that is an art of a Master!
If Audya is as good as SD1 at that point, the stylemaker(s) have to be very careful not to "destroy" it.
Cheers and Happy Easter.
GJ