My understanding is that the GW-8 is going to be loaded (and based on what I've seen in the manual) with western styles, but each region specific unit will include all the western styles along with styles specific to their country or region. If you look at the manual you'll see it's choc-full-of western styles.
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GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.