I've been able to load any of my Yamaha styles into this machine including the CVP styles. The only limitation is the number of variations and tracks. There are fewer accomp. tracks so when I load in a Big Band for example, there are only three accomp. tracks instead of five in other products, so you have to listen to how the style plays on the DGX keyboards. I also tied loading in some converted Roland to Yamaha Middle Eastern styles and they worked fine too.
They give you some styles on a supplied floppy disk which comes with the keyboard.