From what I have been told, the 441 additional styles on the supplied zip disk includes all styles done on the g600,g800 and also older roland keyboards.
I'm sure others, including Fran Carango, who uses the G1000 will know for sure. I have a G600 in my store, and I beleive it's stock styles are definetely in the EM and G1000 keyboard
George Kaye
Kaye's Music Scene