Hi Marcus,
If I simply select Tyros5 as the instrument in the 'Your Instrument' box on the styles page of Yamaha Musicsoft, the 'Udo Rock' style appears at the top of the list (if sorted by 'Most recent').
However if I also click the 'Compatible' box (which is what actually filters the list for the selected keyboard) with Tyros5 as the keyboard, the Udo Rock style disappears from the list!
I think that this indicates that the style does use voices which are only currently available on Genos.
It is confusing (like other things on this awful website these days!), but even after selecting the keyboard, you still need to click the 'Compatible' box in order to filter the list for it!
Of course I'm sure that Yamaha Musicsoft will happily sell you the style even though you don't have a Genos!
Regards
Ian