I'm going to speculate here..., and this is based off of info read on the specs (at other sites). It's possible there will be more than one version of the GW-8. The current model GW-7 is really geared for more "World" styles of music. I've read a few write ups on the GW-8 that said basically the styles may vary depending upon region. So one would assume there may be a western and eastern version of this keyboard.

The GW-7 wasn't orginally set to be released in the US. It was one of those last minute decisions by Roland. The GW was a pretty good seller for them and it appears they seem to now realize there's a need for a Western version as well.