I'll agree the S700 has a few more features such as style recording, and more indepth sequencer (meaning more post editing options)..., but I think the GW has the S500/550/700 beat for sounds. Too much hype on mega voices IMO. SA voices are another thing though as they're in a league all their own.

I thought the styles on the S700 were pretty good.., but I would say my only gripe with them (which has been brought up a lot) was they sounded way too compressed and over quantized..., and he drums were usual Yamaha (some like them some don't)