I would be very surprised to see that the soundset in this thing is very much different from a GW-8. In fact, the GW-8 probably offers more ROM than this. Give up the eight-track recorder (only two at a time, so a Zoom R16 is a better bet anyway if you want to track a band) and you might easily be fooled into thinking the GW-8 is the better keyboard, seeing as how you get a great arranger thrown in...

The Juno Gi probably has a stronger emphasis on modern, contemporary sounds (but the GW-8 is no slouch in the synth area), but how many of us are really looking for that, anyway?
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An arranger is just a tool. What matters is what you build with it..!