I have owned the G70, E60, GW-7, Sonic Cell, and Juno G..

I will assure you , although they all sound great..the G70 is easily the winner overall and also in the sound department..

The GW-8 is a GW-7 with a Sonic Cell engine with it's player..Same sound engine in the Juno G...and most likely the new Juno [76 key]...

The drawback on the GW8 is the dialing for sounds and styles...No searching while play ..even the performances have to be dialed..

The GW-8 made be a little easier than using a controller and soft synths...maybe a lot easier..