Interesting- looks like the 4V motor, radial brakes and I would guess a low seat height option, looking at how the rider's seat does not blend exactly with the pillion.
Bodywork looks pre-production- I am sure it will look smarter when finished. I'm not sure if it just the camera angle but the Stlevio looks a fair bit sleeker than a GS.
Contrary to some of the doom and gloom merchants, I have a good feeling about this bike- now that it has the 4v motor I think it will be more powerful, reliable and less vibey than the 1200GS.
Guy