dnj,
The styles are pretty similar but with new spark added. Does that warrant stepping from the 9k to the Tyros? Perhaps not, does it warrant buying the Tyros over the 9k perhpas so, it depends on the differences in other features and what each one needs.

Scott,
As far as the horns. I noticed it more on fast passages then I did on the slow ones where it sounded good. I think the sweet horns though sounds as good or better such as the "sweet soprano sax". The other thing that perhaps needs to be taken into account is playing style and how any instrument sounds. It will be hard to tell for sure until each person gets their hands on one and plays with their style of play and hear what comes out. IMO
jam on,
Terry